Rapibloc 300 mg powder for solution for infusion

Landiolol is indicated in adults for:

• Supraventricular tachycardia and for the rapid control of ventricular rate in patients with atrial fibrillation or atrial flutter in perioperative, postoperative, or other circumstances where short-term control of the ventricular rate with a short acting agent is desirable.

• Non-compensatory sinus tachycardia where, in the physician's judgment the rapid heart rate requires specific intervention.

Landiolol is indicated in children and adolescents from 0 up to 18 years for:

• rapid heart rate control and conversion to sinus rhythm in patients with atrioventricular re-entry tachycardia and atrioventricular node re-entry tachycardia when adenosine is ineffective, contraindicated, or not tolerated.

Landiolol is not intended for use in chronic settings.

Posology

Landiolol is intended for intravenous use in a monitored setting. Only a well-qualified health care professional should administer landiolol. The dosage of landiolol should be titrated individually.

The infusion is usually started with an infusion rate of 10 - 40 micrograms/kg/min, which will establish the heartrate lowering effect within 10 - 20 min.

If rapid onset of the heartrate lowering effect is desired (within 2 to 4 min), an optional loading dose of 100 micrograms/kg/min for 1 min can be considered, followed by continuous intravenous infusion of 10 - 40 micrograms/kg/min.

Lower starting doses should be used for patients with cardiac dysfunction and septic shock. Dosing instructions are provided under “special populations” and in the integrated dosing scheme.

Maximum dose: The maintenance dose may be increased up to 80 micrograms/kg/min for a limited time period (see section 5.2), if the cardiovascular status of the patient requires and allows such an increase of the dose and the maximum daily dose is not exceeded.

The maximum recommended daily dose of landiolol hydrochloride is 57.6 mg/kg/day (e.g., infusion of 40 micrograms/kg/min for 24 hours).

There is limited experience with landiolol infusion durations beyond 24 hours for doses >10 μg/kg/min.

Conversion formula for continuous intravenous infusion: micrograms /kg/min to ml/h

(Rapibloc 300 mg/50 ml = 6 mg/ml):

Target dose (micrograms /kg/min) x body weight (kg)/100 = infusion rate (ml/h)

Conversion table (example):

Optional bolus administration for hemodynamically stable patients:

Conversion formula from 100 micrograms/kg/min to ml/h (Rapibloc 300 mg/50 ml = 6 mg/ml):

Loading dose infusion rate (ml/h) for 1 minute = body weight (kg)

(Example: 70 ml/h loading dose infusion rate for 1 minute for a 70 kg patient)

In case of an adverse reaction (see section 4.8), the dose of landiolol should be reduced or the infusion be discontinued, and patients should receive appropriate medical management if needed. In the event of hypotension or bradycardia, administration of landiolol can be restarted at a lower dose after the blood pressure or heart rate have returned to an acceptable level. In patients with a low systolic blood pressure extra caution is needed when adjusting the dosage and during the maintenance infusion.

Transition to an alternative drug: After achieving adequate control of the heart rate and a stable clinical status, transition to alternative medicinal products (such as oral antiarrhythmics) may be accomplished.

When landiolol is replaced by alternative medicinal products, the physician should carefully consider the labelling and dosage of the alternative drug. If switched to an alternative medicinal product the dosage of landiolol can be reduced as follows:

• Within the first hour after the first dose of the alternative medicinal product has been administered, the infusion rate of landiolol should be reduced by one-half (50%).
• After administration of the second dose of the alternative medicinal product, the patient's response should be supervised and if satisfactory control is maintained for a least one hour, the landiolol infusion can be discontinued.

Special populations

Elderly population (≥ 65 years)

No dose adjustment is necessary.

Renal impairment

No dose adjustment is necessary (see sections 4.4 and 5.2).

Hepatic impairment

Data regarding the treatment in patients with hepatic impairment is limited (see section 5.2). Careful dosing starting with the lowest dose is recommended in patients with all degrees of hepatic impairment.

Cardiac dysfunction

In patients with impaired left ventricular function (LVEF <40%, CI <2.5 L/min/m², NYHA 3-4) e.g., after cardiac surgery, during ischemia or in septic states, lower doses starting from 1 microgram/kg/min and increased in a stepwise fashion under close blood pressure monitoring up to 10 micrograms/kg/min have been used to achieve heart rate control. Further dose increases may be considered under close hemodynamic monitoring if required and tolerated by the patient´s cardiovascular status.

Septic shock

In patients with septic shock lower doses starting from 1 microgram/kg/min up to a maximum of 40 micrograms/kg/min have been used to achieve heart rate control. The dose was increased in increments of 1 microgram/kg/min with a minimum dose interval of 20 minutes under close blood pressure monitoring.

Paediatric population

Landiolol is intended for intravenous use only in a monitored setting. The dosage of landiolol should be titrated individually. The administration is usually started with an infusion rate of 5 micrograms/kg/min, which can be gradually increased up to 40 micrograms/kg/min.

There is limited experience with landiolol infusion beyond 24 hours in paediatric patients.

Children with cardiac dysfunction

For paediatric patients with cardiac dysfunction, caution should be exercised, and a lower initial dose may be needed, see section 5.1. Further dose increases may be considered under close hemodynamic monitoring if required and tolerated by the patient´s cardiovascular status.

Method of administration

Rapibloc must be reconstituted before administration (for instructions see section 6.6) and used immediately after opening (see sections 4.4 and 6.3).

Rapibloc must not be mixed with other medicinal products except those listed in section 6.6.

Landiolol should be administered intravenously via a central line or a peripheral line and should not be administered through the same intravenous line as other medicinal products (see section 6.6).

Contrary to other beta-blockers, landiolol did not show withdrawal tachycardia in response to abrupt termination after 24 h continuous infusion. Nevertheless, patients should be closely monitored when administration of landiolol is to be discontinued.

- Hypersensitivity to the active substance or to any of the excipients listed in section 6.1.

- Severe bradycardia (less than 50 beats per minute)

- Sick sinus syndrome

- Severe atrioventricular (AV) nodal conductance disorders (without pacemaker): 2nd or 3rd degree AV block

- Cardiogenic shock

- Severe hypotension

- Decompensated heart failure when considered not related to the arrhythmia

- Pulmonary hypertension

- Non-treated phaeochromocytoma

- Acute asthmatic attack

- Severe, uncorrectable metabolic acidosis

Rapibloc must be reconstituted before administration and used immediately after opening (see section 6).

The most frequently observed side effect is hypotension which is rapidly reversible with dosage reduction or discontinuation.

Monitoring

It is advised to continuously monitor the blood pressure and the ECG in all patients treated with landiolol.

Pre-excitation syndrome

Beta-blockers should be avoided in patients with pre-excitation syndrome in combination with atrial fibrillation. In these patients beta-blockade of the atrioventricular node may increase the conduction through the accessory pathway and may precipitate ventricular fibrillation.

First degree heart block

Due to its negative effect on atrioventricular conduction time, beta-blockers should only be given with caution to patients with first degree heart block (see also section 4.3).

Prinzmetal's angina

Beta-blockers may increase the number and the duration of anginal attacks in patients with Prinzmetal's angina (vasospastic angina) due to unopposed alpha-receptor mediated coronary artery vasoconstriction. Non-selective beta-blockers should not be used for these patients and beta-1 selective blockers only with the utmost care.

Heart failure and hemodynamically compromised patients

The use of landiolol for the control of ventricular response in patients with supraventricular arrhythmias should be undertaken with caution in patients with (pre-existing) heart failure or when the patient is compromised hemodynamically or is taking other drugs that decrease any or all of the following: peripheral resistance, myocardial filling, myocardial contractility, or electrical impulse propagation in the myocardium. The benefits of potential rate control should be balanced against the risk of further depressing myocardial contractility. At the first sign or symptom of further worsening, dose should not be increased and, if considered necessary, landiolol should be discontinued and patients should receive appropriate medical management.

Concomitant administration

Concomitant administration of landiolol with verapamil or diltiazem is not recommended in patients with atrioventricular conduction abnormalities (see section 4.5).

Diabetic patients

Landiolol should be used with caution in diabetics or in case of hypoglycaemia. Hypoglycaemia is more severe with less cardio-selective beta-blockers. Beta-blockers can mask the prodromal symptoms of hypoglycaemia such as tachycardia. Dizziness and sweating, however, may not be affected.

Renal impairment

The main metabolite of landiolol (M1) is excreted through the kidneys and is likely to accumulate in patients with renal impairment. Although the landiolol metabolite (M1) has no beta-blocking activity even at doses 200 times higher than the parent drug, landiolol should be used with caution in patients with impaired renal function.

The results of a clinical study indicate that no special precautions are required when administering landiolol to patients undergoing renal replacement therapy.

Phaeochromocytoma

Landiolol should be used with caution and only after pre-treatment with alpha-receptor blockers in patients with phaeochromocytoma (see also section 4.3).

Bronchospastic disease

Patients with bronchospastic disease should, in general, not receive beta-blockers. Because of the high relative beta-1 selectivity and titratability, landiolol can be used with caution in such patients. Landiolol should be carefully titrated to obtain the lowest possible effective dose. In the event of bronchospasm, the infusion should be terminated immediately, and a beta-2 agonist should be administered, if necessary. If the patient already uses a beta-2 receptor-stimulating agent, it might be necessary to re-evaluate the dose of this agent.

Peripheral circulatory disorders

In patients with peripheral circulatory disorders (Raynaud's disease or syndrome, intermittent claudication), beta-blockers should be used with great caution as aggravation of these disorders may occur.

Beta-blockers may increase both the sensitivity toward allergens and the seriousness of anaphylactic reactions. Patients using beta-blockers may be unresponsive to the usual doses of epinephrine used to treat anaphylactic reactions (see also section 4.5).

This medicine contains less than 1 mmol sodium (23 mg) per vial, that is to say essentially “sodium-free”.

Calcium antagonists

Calcium antagonists such as dihydropyridine derivatives (e.g., nifedipine) may increase the risk of hypotension. In patients with cardiac insufficiency, concomitant treatment with beta-blocking agents may lead to cardiac failure. Careful titration of landiolol and appropriate hemodynamic monitoring is recommended.

Antiarrhythmic drugs

Administration of landiolol should be titrated with caution when concomitantly used with verapamil, diltiazem, class I antiarrhythmic agents, amiodarone or digitalis preparations since co-administration can result in excessive suppression of cardiac function and/or atrioventricular conduction abnormalities.

Antidiabetic drugs

Landiolol should not be used concomitantly with verapamil or diltiazem in patients with atrioventricular conduction abnormalities (see section 4.4).

Concomitant use of landiolol and insulin or oral antidiabetic medicinal products may affect the blood sugar lowering effect. Attention should be given to the blood sugar levels when these medicinal products are administered concomitantly, as beta-adrenergic blockade may mask signs of hypoglycaemia such as tachycardia.

Medicinal products used during anaesthesia

Continuation of the beta-blocker use during induction of narcosis, intubation and termination of narcosis reduces the risk of arrhythmia.

In case the patient's intravascular volume status is uncertain or antihypertensive medicinal products (including other beta-blocking agents) are concomitantly administered with landiolol, reflex tachycardia may be attenuated, and the risk of hypotension can increase.

The hypotensive effects of inhalation anaesthetic agents may be increased in the presence of landiolol. The dosage of either agent may be adjusted as needed to maintain the desired hemodynamics.

Administration of landiolol should be titrated with caution when concomitantly used with anaesthetics with heartrate lowering effect, esterase substrates (e.g., suxamethonium chloride) or cholinesterase inhibitors (e.g. neostigmine) since co-administration may intensify the heartrate lowering effect or prolong the duration of action of landiolol.

An in vitro study using human plasma found that co-administration of suxamethonium could increase the maximum blood concentration of landiolol hydrochloride by about 20%. The antagonistic inhibition may also cause a prolongation of the duration of suxamethonium chloride induced neuromuscular blockage.

Nonsteroidal anti-inflammatory drugs (NSAID)

NSAIDs may decrease the hypotensive effects of beta-blockers.

Special caution must be taken when using floctafenine concomitantly with beta-blockers.

Drugs with antihypertensive effects (including antidepressants, antipsychotics etc)

Concomitant administration of landiolol with tricyclic antidepressants, barbiturates, phenothiazines or antihypertensive agents may increase the blood pressure lowering effect. Administration of landiolol should be adjusted carefully to avoid unexpected hypotension. Special caution must be taken when using amisulpride.

The combination of landiolol with ganglion blocking agents can enhance the hypotensive effect.

Sympathomimetic drugs

The effects of landiolol may be counteracted if concomitantly administered with sympathomimetic medicinal products having beta-adrenergic agonist activity. The dose of either agent may need to be adjusted based on patient response, or use of alternate therapeutic agents considered.

Catecholamine-depleting agents

Catecholamine-depleting agents or antisympathotonic agents (e.g., reserpine, clonidine, dexmedetomidine) may have an additive effect when concomitantly administered with landiolol. Patients treated concurrently with these agents should be closely monitored for evidence of hypotension or marked bradycardia.

Concomitant use of clonidine and beta-blockers increase the risk of “rebound” hypertension. Although a rebound hypertensive effect was not observed after landiolol administration for 24 hours, such an effect cannot be excluded if landiolol is used in combination with clonidine.

Heparin

When heparin was administered intravenously during landiolol infusion in patients undergoing cardiovascular surgery, there was a 50% decrease in landiolol plasma levels in conjunction with a heparin induced decrease in blood pressure and an increase in landiolol circulation time. Heart rate values did not change in this situation.

Interactions with other medicinal products

Anaphylactic reactions caused by other medicinal products may be more serious in patients taking beta-blockers. These patients can be resistant to treatment with epinephrine at the normal dose, but intravenous injection of glucagon is effective (see also section 4.4).

The interaction potential of the landiolol metabolites M1 and M2 with concomitant used medicinal products is not known. The pharmacodynamic effects of the metabolites are considered not clinically relevant (see section 5.2).

Paediatric population

Interaction studies have only been performed in adults.

Pregnancy

There are limited data from the use of landiolol in pregnant women available. In the only placebo-controlled clinical study in 32 patients scheduled for caesarean delivery 200 micrograms/kg landiolol administered at time of anaesthesia induction attenuated the hemodynamic response caused by tracheal intubation. No adverse events were reported. No differences were observed in Apgar score at 1 min and 5 min between landiolol-treated and untreated patients. Because of its high beta-1 selectivity, landiolol did not affect uterine contractions. Animal studies do not indicate clinically relevant effects with respect to reproductive toxicity (see section 5.3). As a precautionary measure, it is preferable to avoid the use of landiolol during pregnancy.

Based on the pharmacological action of beta-blocking agents, in the later period of pregnancy, side effects on the foetus and neonate (especially hypoglycaemia, hypotension and bradycardia) should be taken into account.

If the treatment with landiolol is considered necessary, the uteroplacental blood flow and foetal growth should be monitored. The newborn must be closely monitored.

Breastfeeding

It is unknown whether landiolol or its metabolites are excreted in human milk. Available pharmacokinetic data in animals have shown excretion of landiolol in milk. A risk to the suckling child cannot be excluded. A decision must be made whether to discontinue breastfeeding or to discontinue/abstain from landiolol therapy taking into account the benefit of breastfeeding for the child and the benefit of therapy for the woman.

Fertility

Landiolol was not shown to alter fertility in animal studies (see section 5.3).

Not relevant.

a. Summary of the safety profile

The most frequently observed adverse drug reaction (ADR) reported for clinical trials (2382patients) and for postmarketing treatment outcome studies/use surveys (1,257 patients) for landiolol were hypotension and bradycardia (≥1 to <10 %).

ADRs are tabulated below by system organ class and frequency; very common (≥ 1/10), common (≥ 1/100 to < 1/10), uncommon (≥ 1/1,000 to < 1/100), rare (≥ 1/10,000 to < 1/1,000), very rare (< 1/10,000) and not known (cannot be estimated from the available data).

b. Tabulated summary of adverse reactions

* frequency is based on a pooled analysis of 42 studies (i.e. placebo-, active-, no treatment-controlled, as well as uncontrolled studies), in which 2264 patients were treated with landiolol

c. Description of selected adverse reactions

In postmarketing treatment outcome studies/use surveys with landiolol, the adverse event frequency for hypotension and bradycardia was 0.8% and 0.7%, respectively (of 1,257 patients). All cases of hypotension and bradycardia related to landiolol treatment in the described studies resolved or improved, without any action being taken or within minutes after discontinuation of landiolol and/or additional treatment.

Serious adverse events based on clinical studies/postmarketing use surveys: shock due to excessive hypotension was reported in one perioperative clinical trial patient with heavy bleeding (the event resolved 10 minutes after landiolol, prostaglandine and isoflurane discontinuation). Cardiac arrest, complete AV block, sinus arrest, and severe bradycardia reported from clinical trials and post-marketing surveillance for landiolol treatment were mainly associated with elderly patients or with patients having hypertension or cardiac diseases as complications.

Measures to be taken if these specific adverse reactions occur are described in section 4.2.

d. Paediatric population

In the LANDI-PED study, the most common ADR in landiolol-treated patients was hypotension (10.0%, 6/60). However, all cases recovered successfully after discontinuation of drug.

e. Other special populations

In the LANDI-SEP study in patients with sepsis, landiolol related adverse events included hypotension (5 events in 5/98 [5.1%] patients), bradycardia (3 events in 2/98 [2.0%] patients) or heart rate decreased (1 event in 1/98 [1.0%] patients), cardiac dysfunction (1 event in 1/98 [1.0%] patients), low cardiac output syndrome (1 event in 1/98 [1.0%] patients), hepatic enzyme increased (1 event in 1/98 [1.0%] patients), blood lactic acid increased (1 event in 1/98 [1.0%] patients), and polyuria (1 event in 1/98 [1.0%] patients).

There are limited safety data for the use of landiolol in the elderly. Uncertainties regarding the safety profile of landiolol need to be considered, as adverse events could also result from the use of co-medications or from the anaesthesia.

Reporting of suspected adverse reactions

Reporting suspected adverse reactions after authorisation of the medicinal product is important. It allows continued monitoring of the benefit/risk balance of the medicinal product. Healthcare professionals are asked to report any suspected adverse reactions via the Yellow Card Scheme at www.mhra.gov.uk/yellowcard.

In case of overdose the following symptoms can occur: Severe hypotension, severe bradycardia, AV block, heart insufficiency, cardiogenic shock, cardiac arrest, bronchospasm, respiratory insufficiency, loss of consciousness to coma, convulsions, nausea, vomiting, hypoglycaemia, hyperkalaemia.

In case of overdose, administration of landiolol should be discontinued immediately.

The time taken for symptoms to disappear following overdosing will depend on the amount of landiolol administered. Although landiolol's heart rate reducing effect decreases rapidly after the end of administration, this may take longer than 30 minutes as seen with discontinuation at therapeutic dose levels. Artificial respiration may be necessary. Based on the observed clinical effects, the following general measures should be considered:

- Bradycardia: atropine or another anticholinergic medicinal product should be given intravenously and then a beta-1-stimulant (dobutamine, etc.). If bradycardia cannot be treated sufficiently, a pacemaker may be necessary.

- Bronchospasm: nebulized beta-2-sympathomimetics should be given. If this treatment is not sufficient, intravenous beta-2-sympathomimetics or aminophylline can be considered.

- Symptomatic hypotension: fluids and/or pressor agents should be given intravenously.

- Cardiovascular depression or cardiac shock: diuretics (in case of lung oedema) or sympathomimetics can be administered. The dose of sympathomimetics (depending on the symptoms e.g. dobutamine, dopamine, noradrenaline, adrenaline, etc.) depends on the therapeutic effect. In case further treatment is necessary, the following agents can be given intravenously: atropine, inotropic agents, calcium ions.

Pharmacotherapeutic group: Beta-blocking agents, selective

ATC code: C07AB14

Mechanism of action / Pharmacodynamic effects

Landiolol is a highly selective beta-1-adrenoreceptor antagonist (being used as pure S,S-enantiomer of two chiral centers, the selectivity for beta-1-receptor blockade is 255 times higher than for beta-2-receptor blockade) that inhibits the positive chronotropic effects of the catecholamines adrenaline and noradrenaline on the heart, where beta-1-receptors are predominantly located. Landiolol, as other beta-blockers, is thought to reduce the sympathetic drive, resulting in reduction in heart rate, decrease in spontaneous firing of ectopic pacemakers, slowing the conduction and increase the refractory period of the AV node. In clinical studies, landiolol controlled tachycardia in an ultra-short acting manner with a fast onset and offset of action and further demonstrated anti-ischaemic and cardioprotective effects.

Clinical efficacy

Based on the data of 21 published clinical studies, 1369 patients with perioperative or paroxysmal supraventricular tachyarrhythmias (SVT) were treated with landiolol. The efficacy endpoint was determined as heart rate reduction and/or conversion to sinus rhythm for the treatment of sinus tachycardia or SVTs. For the prevention of perioperative atrial fibrillation and for the treatment or prevention of adverse hemodynamic and other responses to specific stimuli related to invasive procedures, 3,039 patients were treated with landiolol. Control of heart rate and blood pressure were the main efficacy parameters in these studies. A significant reduction in heart rate or prevention of heart rate surges was observed in landiolol treated patients.

Paediatric population

In the prospective LANDI-PED study, 60 patients with SVT aged 0 to <18 years were treated with landiolol for a maximum duration of 24 hours. Patients could only be included if they were refractory, relapsed or contraindicated to adenosine; or had another form of paroxysmal SVT not indicated for adenosine.Forty patients were aged <2 years: mean (SD) age 6.2 (5.1) months, 85% were in the surgical group. Among the 20 patients aged 2 to <18 years, the mean (SD) age was 7.8 (4.4) years, and 45% were in the surgical group. To analyse the primary endpoint of achieving normal sinus rhythm with 210 min patients with Inappropriate sinus tachycardia (IST) were excluded. The primary endpoint was established in 1/19 (5.3%) patients aged < 2 years and in 6/11 (54.6%) patients aged 2 to <18 years. A reduction in HR ≥20% (i.e. secondary efficacy endpoint) was achieved in 14/40 (35%) patients aged < 2 years and 10/20 (50%) aged 2-18 years within 210 min of landiolol infusion. Most patients (81.67%) were titrated to a dose of 40 micrograms/kg/min, the mean (SD) total duration of treatment was 7.9 (8.4) hours.

LANDI-PED study results: conversion to normal sinus rhythm (NSR) and reduction in heart rate>20% within 210 minutes by SVT type at baseline

The retrospective study (LANDI-NEONATE) included 62 neonate patients, of whom 59.7% were preterm, with a median age of 1 day (range: 1–31 days). The median weight of the total study population was 2.5 kg (range: 0.6–5.4 kg). All patients had severe postnatal complications. At baseline, 62 (100%) patients had heart failure, and pulmonary hypertension was present in 47/62 patients (75.8%). During the treatment period, 90% of patients received vasopressors (norepinephrine, vasopressin). Positive inotropic drugs were also prescribed to the majority of patients (93.5%). Most often, patients received dobutamine (92%) and milrinone (90%), and 71% of patients received levosimendan. Landiolol treatment normalized the heart rate to age-appropriate values in 92% of patients within 24 hours. Median starting dose was 8.8 micrograms/kg/min (range 3.9 to 25.3 micrograms/kg/min), and median dose administered at heart rate normalization was 10 micrograms/kg/min (range 2.4 to 44.4 micrograms/kg/min). The median duration of landiolol infusion was 82.5 hours (range 2 to 759.3 hours).

When administered by continuous intravenous infusion, the concentration of landiolol in blood reached steady-state values about 15 minutes after initiation of administration. Steady-state can also be achieved faster (up to 2 - 5 minutes) with regimens that use a higher loading dose infused for 1 minute followed by continuous infusion at a lower dosage.

Absorption

In healthy volunteers, the mean peak plasma concentration of landiolol was 0.294 micrograms/ml following a single landiolol bolus administration of 100 micrograms/kg. The respective steady-state plasma levels after 2 h infusion of 10, 20 and 40 micrograms/kg/min were 0.2, 0.4 and 0.8 micrograms/ml, respectively.

In a study including patients with atrial fibrillation or atrial flutter, one group received doses of 40 micrograms/kg/min for up to 190 minutes without dose escalation, resulting in peak plasma concentrations ranging from 0.52 to 1.77 micrograms/ml. In the study group receiving doses escalated to 80 micrograms/kg/min for 14 to 174 minutes, peak plasma concentrations ranging from 1.51 to 3.33 micrograms/ml were observed.

Due to the molecular characteristics of landiolol (low molecular weight of approx. 0.5 kDa and low protein binding capacity), no significant reabsorption by active transport via renal uptake transporters OAT1, OAT3 or OCT2 is anticipated.

Distribution

The volume of distribution of landiolol was 0.3 l/kg - 0.4 l/kg following a single bolus administration of 100 – 300 micrograms/kg or in steady state during a landiolol infusion of 20 - 80 micrograms/kg/min.

Protein binding of landiolol is low (<10%) and dose dependent.

Biotransformation

Landiolol is metabolised via hydrolysis of the ester moiety. In vitro and in vivo data suggest that landiolol is mainly metabolised in the plasma by pseudocholinesterases and carboxylesterases. Hydrolysis releases a ketal (the alcoholic component) that is further cleaved to yield glycerol and acetone, and the carboxylic acid component (metabolite M1), which subsequently undergoes beta-oxidation to form metabolite M2 (a substituted benzoic acid). The beta-1-adrenoreceptor blocking activity of landiolol metabolites M1 and M2 is 1/200 or less of the parent compound indicating a negligible effect on pharmacodynamics taking into account the maximum recommended landiolol dose and infusion duration.

Neither landiolol nor the metabolites M1 and M2 showed inhibitory effects on the metabolic activity of different cytochrome P450 molecular species (CYP1A2, 2C9, 2C19, 2D6 and 3A4) in vitro. The cytochrome P450 content was not affected in rats after repeated intravenous administration of landiolol. There are no data on a potential effect of landiolol or its metabolites on CYP P450 induction or time dependent inhibition available.

Elimination

In humans, the main excretion pathway of landiolol is urine. After intravenous administration, about 75% of the administered dose (54.4% as metabolite M1 and 11.5% as metabolite M2) is excreted within 4 hours. The primary excretion/elimination pathway of landiolol is via urine with a urinary excretion rate for landiolol and its major metabolites M1 and M2 of >99% within 24 hours.

The total body clearance of landiolol was 66.1 ml/kg/min after a single landiolol bolus administration of 100 micrograms/kg, and 57 ml/kg/min in steady state after a 20 hour continuous landiolol infusion of 40 microgams/kg/min.

The elimination half-life of landiolol was 3.2 minutes after a single landiolol bolus administration of 100 micrograms/kg, and 4.52 minutes after a 20 hour continuous landiolol infusion of 40 micrograms/kg/min.

Linearity/non-linearity

Landiolol showed a linear pharmakokinetic - pharmacodynamic (concentration-effect) relationship across the range of the recommended dosages.

Special populations

Hepatic impairment

The impact of liver function on the pharmacokinetics of landiolol was investigated in six patients with mild to moderate hepatic impairment (5 patients Child-Pugh class A, one patient Child-Pugh class B, mean plasma cholinesterase level -62%) and six healthy volunteers. Patients with hepatic impairment show a reduction in the volume of distribution of landiolol and an increase of landiolol plasma levels by 40%. The half-life and elimination of the drug is not different from healthy adults.

Renal impairment

The pharmacokinetics in patients with mild or moderate renal impairment has not been evaluated.

The pharmacokinetic characteristics of landiolol were studied in patients (n=7) with septic shock undergoing renal replacement therapy. The contribution of dialytic clearance to the total clearance of landiolol was approximately 2% and considered negligible. For the landiolol metabolite M1, the contribution of dialytic clearance to total clearance was approximately 30%. No accumulation of landiolol and its metabolite M1 was observed over the study period of 8 hours. The results of the clinical study indicate that no special precautions are required when administering landiolol to patients undergoing renal replacement therapy.

Paediatric population

In the LANDI-PED study in which landiolol was administered by continous intravenous infusion, the pharmacokinetic characteristics of landiolol were studied in 16 patients (range 0-16 years). The steady state mean plasma concentrations were 0.2 micrograms/ml, 0.5 micrograms/ml and 0.6 micrograms/ml respectively for administered doses of 10 micrograms/kg/min, 20 micrograms/kg/min and 40 micrograms/kg/min. In steady state after landiolol infusion of 5-40 micrograms/kg/min, the volume of distribution of landiolol was 0.4 l/kg, the total body clearance was 69.5 ml/min/kg and the elimination half-life was 4.2 minutes.

Another study (HEARTFUL) investigated total systemic clearance of landiolol in 21 patients (aged ≥3 months to <15 years) who developed SVTs and were treated with dose of 1-10 micrograms/kg/min. The median total body clearance was 43.0 ml/min/kg (range 27.8–206) in the overall population.

Caucasian and Asian population

No major differences in the pharmacokinetics of landiolol are observed between a Caucasian and Japanese population.

Non-clinical data revealed no special risk for humans based on conventional studies of safety pharmacology, single and repeated dose toxicity, and genotoxicity.

Landiolol did not demonstrate reproductive or developmental toxicities at clinically relevant infusion rates and exposure levels. The lowest identified NOAEL was 25 mg/kg/min in an embryo-fetal study in rats, which is 100-fold above the maximum clinical infusion rate.

Excretion of landiolol into milk was observed after 1 mg/kg landiolol i.v. bolus administration to lactating rats, whereas the levels in milk exceeded the maternal plasma concentrations.

Mannitol E421

Sodium hydroxide E524 (for pH adjustment)

This medicinal product must not be mixed with other medicinal products except those mentioned in section 6.6.

3 years

Chemical and physical in-use stability after reconstitution has been demonstrated for 24 hours at 25°C. From a microbiological point of view, the product should be used immediately. If not used immediately, in-use storage times and condition prior to use are the responsibility of the user. Do not freeze.

This medicinal product does not require any special temperature storage conditions. Keep the vial in the outer carton in order to protect from light.

For storage conditions after reconstitution of the medicinal product, see section 6.3.

Colourless glass (Type 1) 50 ml vial with a bromobutyl or chlorobutyl rubber stopper and an aluminium flip-off seal.

Pack size of 1 vial contains a powder for solution for infusion, including 300 mg landiolol hydrochloride.

Rapibloc must not be administered without reconstitution.

Instructions for use

Reconstitute 1 vial with 50 ml of one of the following solutions:
  • NaCl 9 mg/ml (0.9%) solution
  • Glucose 50 mg/ml (5%) solution
  • Ringer's solution
  • Ringer-lactate solution

The white to almost white powder dissolves completely after reconstitution. Mix gently until a clear solution is obtained. Reconstituted solutions should be visually examined for visible particles and discoloration. Only clear and colourless solutions should be used.

Any unused medicinal product or waste material should be disposed of in accordance with local requirements.