Teveten 600mg film-coated tablets.

Eprosartan mesilate equivalent to 600mg eprosartan free base.

For excipients, see section 6.1.

Film-coated tablets.

Capsule-shaped, biconvex, white film-coated tablet with the inscription '5046'.

Eprosartan is indicated for the treatment of essential hypertension.

The recommended dose is 600 mg eprosartan once daily.

The dose may be increased to 800 mg eprosartan once daily if further response is required. Achievement of maximal blood pressure reduction in most patients may take 2 to 3 weeks of treatment.

Eprosartan may be used alone or in combination with other anti-hypertensives. In particular, addition of a thiazide-type diuretic such as hydrochlorothiazide or a calcium channel blocker such as sustained release nifedipine has been shown to have an additive effect with Eprosartan.

Eprosartan may be taken with or without food.

Geriatric patients

No dose adjustment is required in the elderly.

Dosage in Hepatically Impaired Patients:

There is limited experience in patients with hepatic insufficiency (see section 4.3).

Dosage in Renally Impaired Patients:

In patients with moderate or severe renal impairment (creatinine clearance <60 ml/min), the daily dose should not exceed 600 mg.

Paediatric patients

Teveten is not recommended for use in children and adolescents due to lack of data on safety and efficacy

Hypersensitivity to the active substance or to any of the excipients.

Second and third trimester of pregnancy (see sections 4.4 and 4.6).

Severe hepatic impairment.

Haemodynamically significant bilateral renovascular disease or severe stenosis of a solitary functioning kidney

Hepatic impairment

When Eprosartan is used in patients with mild to moderate hepatic impairment, special care should be exercised due to the fact that there is limited experience in this patient population

Renal impairment

No dose adjustment is required in patients with mild to moderate renal insufficiency (creatinine clearance ≥ 30 ml/min). Caution is recommended for use in patients with creatinine clearance < 30 ml/min or in patients undergoing dialysis

Patients at risk of renal impairment

Patients whose renal function is dependent predominantly on the activity of the renin-angiotensin-aldosterone system (e.g., patients with severe cardiac insufficiency [NYHA-classification: class IV], bilateral renal artery stenosis, or renal artery stenosis of a solitary kidney) are at increased risk of developing oliguria and/or progressive azotaemia and rarely acute renal failure during therapy with an angiotensin converting enzyme (ACE) inhibitor. These events are more likely to occur in patients treated concomitantly with a diuretic. The possibility of similar effects cannot be excluded with angiotensin II receptor antagonists. When eprosartan is to be used in patients with renal impairment, renal function should be assessed before starting treatment with eprosartan and at intervals during the course of therapy. If worsening of renal function is observed during therapy, treatment with eprosartan should be reassessed.

Hypotension

Symptomatic hypotension may occur in patients with severe sodium depletion and/or volume depletion (e.g. high dose diuretic therapy). These conditions should be corrected before commencing therapy. There is an increased risk of severe hypotension when patients with bilateral renal artery stenosis or stenosis of the artery to a single functioning kidney are treated with medical products that affect the renin-angiotensin-aldosterone system.

Aortic and mitral valve stenosis or obstructive hypertrophic cardiomyopathy.

As with other vasodilators, special caution is indicated in patients suffering from haemodynamically relevant aortic or mitral valve stenosis, or obstructive hypertrophic cardiomyopathy.

Primary hyperaldosteronism

Patients with primary hyperaldosteronism will not generally respond to antihypertensive medicinal products acting through inhibition of the renin-angiotensin-aldosterone system. Therefore, the use of Teveten is not recommended.

Hyperkalaemia

Although eprosartan has no significant effect on serum potassium there is no experience of concomitant administration with K-sparing diuretics or K-supplements. Consequently, as with other angiotensin II antagonists, the risk of hyperkalaemia when taken with K-sparing diuretics or K-supplements cannot be excluded. Regular monitoring for serum potassium levels is recommended when drugs that may increase potassium are administered with eprosartan in patients with renal impairment.

Pregnancy

Eprosartan should not be initiated during pregnancy. Unless continued Eprosartan therapy is considered essential, patients planning pregnancy should be changed to alternative anti-hypertensive treatments which have an established safety profile for use in pregnancy. When pregnancy is diagnosed, treatment with Eprosartan should be stopped immediately, and, if appropriate, alternative therapy should be started (see sections 4.3 and 4.6).

Other conditions

Patients with rare hereditary problems of galactose intolerance, the Lapp lactase deficiency or glucose-galactose malabsorption should not take this medicine.

No clinically significant drug interactions have been observed. No effect on the pharmacokinetics of digoxin and the pharmacodynamics of warfarin or glyburide (glibenclamide) has been shown with eprosartan. Similarly no effect on eprosartan pharmacokinetics has been shown with ranitidine, ketoconazole or fluconazole.

Eprosartan has been safely used concomitantly with thiazide diuretics (e.g. hydrochlorothiazide) and calcium channel blockers (e.g. sustained-release nifedipine) without evidence of clinically significant adverse interactions. It has been safely co-administered with hypolipidaemic agents (e.g. lovastatin, simvastatin, pravastatin, fenofibrate, gemfibrozil, niacin).

Reversible increases in serum lithium concentrations and toxicity have been reported during concomitant administration of lithium with ACE inhibitors. The possibility of a similar effect cannot be excluded and careful monitoring of serum lithium levels is recommended during concomitant use.

Eprosartan has been shown not to inhibit human cytochrome P450 enzymes CYP1A, 2A6, 2C9/8, 2C19, 2D6, 2E and 3A in vitro.

Combination with NSAIDs: When Angiotensin II antagonists are administered simultaneously with non-steroidal anti-inflammatory drugs (i.e. selective COX-2 inhibitors, acetylsalicylic acid (> 3g/day) and non-selective NSAIDs), attenuation of the antihypertensive effect may occur.

As with ACE inhibitors, concomitant use of Angiotensin II antagonists and NSAIDs may lead to an increased risk of worsening of renal function, including possible acute renal failure, and an increase in serum potassium, especially in patients with poor pre-existing renal function. The combination should be administered with caution, especially in the elderly. Patients should be adequately hydrated and consideration should be given to monitoring renal function after initiation of concomitant therapy, and periodically thereafter.

Pregnancy

The use of Eprosartan is not recommended during the first trimester of pregnancy (see section 4.4). The use of Eprosartan is contraindicated during second and third trimester of pregnancy (see sections 4.3 and 4.4).

Epidemiological evidence regarding the risk of teratogenicity following exposure to ACE inhibitors during the first trimester of pregnancy has not been conclusive; however, a small increase in risk cannot be excluded. Whilst there is no controlled epidemiological data on the risk with angiotensin II receptor blockers, similar risks may exist for this class of drugs. Unless continued Eprosartan therapy is considered essential, patients planning pregnancy should be changed to alternative anti-hypertensive treatments which have an established safety profile for use in pregnancy. When pregnancy is diagnosed, treatment with Eprosartan should be stopped immediately and, if appropriate, alternative therapy should be started.

Exposure to Eprosartan therapy during the second and third trimesters is known to induce human foetotoxicity (decreased renal function, oligohydramnios, skull ossification retardation) and neonatal toxicity (renal failure, hypotension, hyperkalaemia) (see section 5.3).

Should exposure to Eprosartan have occurred from the second trimester of pregnancy, ultrasound check of renal function and skull is recommended.

Infants whose mothers have taken Eprosartan should be closely observed for hypotension (see sections 4.3 and 4.4).

Lactation

Because no information is available regarding the use of Eprosartan during breast-feeding, Eprosartan is not recommended and alternative treatments with better established safety profiles during breast-feeding are preferable, especially while nursing a newborn or preterm infant.

The effect of eprosartan on the ability to drive and use machines has not been studied, but based on its pharmacodynamic properties, eprosartan is unlikely to affect this ability. When driving vehicles or operating machines, it should be taken into account, that occasionally dizziness or weariness may occur during treatment of hypertension.

Clinical Trials

The most commonly reported adverse drug reactions of patients treated with eprosartan are headache and unspecific gastrointestinal complaints, occurring in approximately 11% and 8%, respectively, of patients.

ADVERSE EVENTS REPORTED DURING CLINICAL TRIALS IN PATIENTS TREATED WITH EPROSARTAN (n = 2316)

Postmarketing experience

In addition to those adverse events reported during clinical trials, the following side effects have been reported spontaneously during postmarketing use of eprosartan. A frequency cannot be estimated from the available data (not known).

Renal and urinary disorders

Impaired renal function including renal failure in patients at risk.

Laboratory Findings

In placebo-controlled clinical studies, significantly elevated serum potassium concentrations were observed in 0.9% of patients treated with eprosartan and 0.3% of patients who received placebo.

Significantly low values of haemoglobin were observed in 0.1% and 0% patients treated with eprosartan and placebo respectively.

In rare cases elevations of BUN values were reported in patients treated with eprosartan. In rare cases increases in liver function values were also observed but were not considered to be causally related to eprosartan treatment.

Limited data are available with regard to overdosage in humans. Eprosartan was well tolerated after oral dosing (maximum unit dose taken to date in humans 1200 mg) with no mortality in rats and mice up to 3000 mg/kg and in dogs up to 1000 mg/kg. The most likely manifestation of overdosage would be hypotension. If symptomatic hypotension occurs, supportive treatment should be instituted.

Eprosartan is a potent, synthetic, orally active non-biphenyl non-tetrazole angiotensin II receptor antagonist, which binds selectively to the AT₁ receptor. Angiotensin II is a potent vasoconstrictor and the primary active hormone of the renin-angiotensin-aldosterone system, playing a major part in the pathophysiology of hypertension. Angiotensin II binds to the AT₁ receptor in many tissues (e.g. smooth vascular musculature, suprarenals, kidney, heart) and produces important biological effects such as vasoconstriction, sodium retention and release of aldosterone. More recently, angiotensin II has been implicated in the genesis of cardiac and vascular hypertrophy through its effect on cardiac and smooth muscle cell growth.

Eprosartan antagonised the effect of angiotensin II on blood pressure, renal blood flow and aldosterone secretion in normal volunteers. In hypertensive patients, comparable blood pressure control is achieved when eprosartan is administered as a single dose or in two divided doses. In placebo-controlled studies, in 299 patients treated receiving 600-800 mg once daily, there was no evidence of first dose postural hypotension. Discontinuation of treatment with eprosartan does not lead to a rapid rebound increase in blood pressure.

Eprosartan was evaluated in mild to moderate hypertensive patients (sitting DBP 95 mmHg and <115 mmHg) and severe hypertensive patients (sitting DBP 115 mmHg and 125 mmHg).

A dose of 1200 mg once daily, for 8 weeks, has been shown in 72 patients in clinical trials to be effective. In placebo-controlled studies using doses up to 1200 mg once daily, there is no apparent dose relationship in the incidence of adverse experiences reported.

In patients with hypertension, blood pressure reduction did not produce a change in heart rate.

In hypertensive patients eprosartan does not affect fasting triglycerides, total cholesterol, or LDL (low density lipoprotein) cholesterol levels. In addition, eprosartan has no effect on fasting blood sugar levels.

Eprosartan does not compromise renal autoregulatory mechanisms. In normal adult males eprosartan has been shown to increase mean effective renal plasma flow. Effective renal plasma flow is not altered in patients with essential hypertension and patients with renal insufficiency treated with eprosartan. Eprosartan does not reduce glomerular filtration rate in normal males, in patients with hypertension or in patients with varying degrees of renal insufficiency. Eprosartan has a natriuretic effect in normal subjects on a salt restricted diet.

Eprosartan does not significantly affect the excretion of urinary uric acid.

Eprosartan does not potentiate effects relating to bradykinin (ACE-mediated), e.g. cough. In a study specifically designed to compare the incidence of cough in patients treated with eprosartan and an angiotensin converting enzyme inhibitor, the incidence of dry persistent cough in patients treated with eprosartan (1.5%) was significantly lower (p<0.05) than that observed in patients treated with an angiotensin converting enzyme inhibitor (5.4%). In a further study investigating the incidence of cough in patients who had previously coughed while taking an angiotensin converting enzyme inhibitor, the incidence of dry, persistent cough was 2.6% on eprosartan, 2.7% on placebo, and 25.0% on an angiotensin converting enzyme inhibitor (p<0.01, eprosartan versus angiotensin converting enzyme inhibitor).

Absolute bioavailability following a single 300 mg oral dose of eprosartan is about 13%, due to limited oral absorption. Eprosartan plasma concentrations peak at one to two hours after an oral dose in the fasted state. Plasma concentrations are dose proportional from 100 to 200 mg, but less than proportional for 400 and 800 mg doses. The terminal elimination half-life of eprosartan following oral administration is typically five to nine hours. A slight accumulation (14%) is seen with chronic use of eprosartan. Administration of eprosartan with food delays absorption with minor increases (<25%) observed in C_max and AUC.

Plasma protein binding of eprosartan is high (approximately 98%) and constant over the concentration range achieved with therapeutic doses. The extent of plasma protein binding is not influenced by gender, age, hepatic dysfunction or mild-moderate renal impairment but has shown to be decreased in a small number of patients with severe renal impairment.

Following oral and intravenous dosing with [¹⁴C] eprosartan in human subjects, eprosartan was the only drug-related compound found in the plasma and faeces. In the urine, approximately 20% of the radioactivity excreted was an acyl glucuronide of eprosartan with the remaining 80% being unchanged eprosartan.

The volume of distribution of eprosartan is about 13 litres. Total plasma clearance is about 130 ml/min. Biliary and renal excretion contribute to the elimination of eprosartan. Following intravenous [¹⁴C] eprosartan, about 61% of radioactivity is recovered in the faeces and about 37% in the urine. Following an oral dose of [¹⁴C] eprosartan, about 90% of radioactivity is recovered in the faeces and about 7% in the urine.

Both AUC and C_max values of eprosartan are increased in the elderly (on average, approximately two-fold).

Following administration of a single 100 mg dose of eprosartan, AUC values of eprosartan (but not C_max) are increased, on average, by approximately 40% in patients with hepatic impairment. Since an intravenous dose of eprosartan was not administered to patients with hepatic impairment, the plasma clearance of eprosartan could not be measured.

Compared to subjects with normal renal function (n=7), mean AUC and C_max values were approximately 30% higher in patients with creatinine clearance 30-59 ml/min (n=11) and approximately 50% higher in patients with creatinine clearance 5-29 ml/min (n=3).

In a separate investigation, mean AUC was approximately 60% higher in patients undergoing dialysis (n=9) compared to subjects with normal renal function (n=10).

There is no difference in the pharmacokinetics of eprosartan between males and females.

General toxicology

Eprosartan given orally at dosages up to 1000 mg/kg per day for up to six months in rats and up to one year in dogs did not result in any significant drug-related toxicity.

Reprotoxicity

In pregnant rabbits, eprosartan has been shown to produce maternal and foetal mortality at 10 mg/kg per day during late pregnancy only. This is most likely due to effects on the renin angiotensin aldosterone system. Maternal toxicity but no foetal effects were observed at 3 mg/kg per day.

Genotoxicity

Genotoxicity was not observed in a battery of in vitro and in vivo tests.

Carcinogenicity

Carcinogenicity was not observed in rats and mice given up to 600 or 2000 mg/kg per day respectively for two years.

Tablet cores

Lactose

Microcrystalline cellulose

Pregelatinised starch

Magnesium stearate

Crospovidone

Film-coat

Hypromellose

Titanium dioxide (E171)

Macrogol 400

Polysorbate 80

None known.

Do not store above 25°C.

Keep container in the outer carton.

Opaque PVC/Aclar blister packs containing 28 tablets or 56 tablets.

HDPE bottles containing 100 tablets.

No special instructions.

Abbott Healthcare Products Limited

Mansbridge Road

West End

Southampton

SO18 3JD

PL 00512/0165

29 November 1999/17 April 2003

18/01/2012

POM