NIOPAM 150

30.62 w/v Iopamidol equivalent to 150mg iodine/ml.

Each ml contains 306.2 mg Iopamidol.

For excipients, see 6.1.

Solution for injection.

Clear aqueous solution filled into colourless glass ampoules or bottles.

X-ray contrast medium for injection, particularly in digital subtraction angiography.

Route of administration

In digital subtraction angiography:

- Intra-ventricular

- Intra-arterial

Dosage

NIOPAM 150: DOSAGE SCHEDULE

Elderly: Dosage as for adults. The lowest effective dose should be used.

Method of administration

No other drugs should be mixed with the contrast medium.

Digital subtraction angiography

For cardiac imaging the contrast medium may be administered intra-arterially by selective catheterisation to provide subtracted images. Niopam 340 and 370 injected intravenously either centrally or peripherally is also recommended for use in this modality.

Use in patients with proven or suspected hypersensitivity to iodine containing preparations of this type.

A positive history of allergy, asthma or untoward reaction during previous similar investigations indicates a need for extra caution; the benefit should clearly outweigh the risk in such patients. Appropriate resuscitative measures should be immediately available.

X-ray examination of women should if possible be conducted during the pre-ovulation phase of the menstrual cycle and should be avoided during pregnancy.

When examining small children or babies, do not limit fluid intake before administering a hypertonic contrast solution. Also, correct any existing water and electrolyte imbalance.

Care should be exercised in carrying out radiographic procedures with contrast media in patients with severe functional impairment of the liver or myocardium, severe systemic disease and in myelomatosis (including Waldenströms macroglobulinemia, multiple myeloma).

In the latter condition patients should not be exposed to dehydration; similarly abnormalities of fluid or electrolyte balance should be corrected prior to use.

Particular care should also be exercised in patients with moderate to severe impairment of renal function (as reflected by a raised blood urea) or in diabetes. Substantial deterioration in renal function is minimised if the patient is well hydrated. Renal function parameters should be monitored after the procedure in these patients.

Patients with severe hepato-renal insufficiency should not be examined unless absolutely indicated. Re-examination should be delayed for 5-7 days.

Special care should be exercised when this product is injected into the right heart or pulmonary artery in patients with pulmonary hypertension. Right heart angiography should be carried out only when absolutely indicated.

Niopam should be administered with caution in elderly patients and patients with increased intracranial pressure or suspicion of intracranial tumour, abscess or haematoma, and in those with a history of a previous reaction to contrast media, asthma, allergy, epilepsy, severe cardiovascular disease, renal impairment, chronic alcoholism or multiple sclerosis. Patients with these conditions have an increased risk of neurological complications.

General anaesthesia may be indicated in selected patients. However, a higher incidence of adverse reactions has been reported in these patients, probably due to the hypotensive effect of the anaesthetic.

Contrast media may promote sickling in individuals who are homozygous for sickle cell disease when injected intravenously.

Patients with phaeochromocytoma may develop severe hypertensive crisis following intravascular Iopamidol. Pre-medication with α-receptor blockers is recommended.

The administration of iodinated contrast media may aggravate the symptoms of myasthenia gravis.

Patients with congestive heart failure should be observed for several hours following the procedure to detect delayed haemodynamic disturbances, which may be associated with a transitory increase in the circulating osmotic load. All other patients should be observed for at least one hour after the procedure, as most of the adverse events occur in this period. The patient should also be informed that allergic reactions may develop up to several days after the procedure; in such case, a physician should be consulted immediately.

In patients who are known epileptics or have a history of epilepsy, anticonvulsant therapy should be maintained before and following myelographic procedures. In some instances, anticonvulsant therapy may be increased for 48 hours before the examination.

Neuroleptics must be absolutely avoided because they lower the seizure threshold. The same applies to analgesics, anti-emetics, antihistamines and sedatives of the phenothiazine group. Whenever possible, treatment with such drugs should be discontinued at least 48 hours before administration of the contrast medium and not be resumed less than 12 hours after completion of the procedure.

Non-ionic contrast media have less anti-coagulant activity in-vitro than ionic media. Meticulous attention should therefore be paid to angiographic technique. Non-ionic media should not be allowed to remain in contact with blood in the syringe and intravascular catheters should be flushed frequently, to minimise the risk of clotting, which rarely has led to serious thromboembolic complications after procedures.

The presence of renal damage in diabetic patients is one of the factors predisposing to renal impairment following contrast media administration.

This may precipitate lactic acidosis in patients who are taking metformin. As a precaution, metformin should be discontinued at the time of, or prior to, the procedure and withheld for 48 hours subsequent to the procedure and re-instituted only after renal function has been re-evaluated and found to be normal.

Niopam should be used with caution in patients with hyperthyroidism. It is possible that hyperthyroidism may recur in patients previously treated for Graves' disease.

Thyroid function tests: use of iodinated contrast media may interfere with tests for thyroid function which depend on iodine estimations, such as Protein Binding Iodine and radioactive iodine uptake. As a consequence they will not accurately reflect thyroid function for up to 16 days following administration of iodinated contrast media. Thyroid function tests not depending on iodine estimations, e.g. T3 resin uptake and total or free thyroxine (T4) assays are not affected.

No other specific interference with physiological functions has been noted.

The administration of an X-ray contrast medium in diabetic patients with nephropathy who are taking biguanides may precipitate lactic acidosis.

Arterial thrombosis has been reported when Iopamidol was given following papaverine.

The administration of vasopressors strongly potentiates the neurological effect of the intra-arterial contrast media.

Contrast media may interfere with laboratory tests for bilirubin, proteins or inorganic substances (e.g. iron, copper, calcium, phosphate). These substances should not be assayed during the same day following the administration of contrast media.

X-ray examination of women should if possible be conducted during the pre-ovulation phase of the menstrual cycle and should be avoided during pregnancy; also, since it has not been demonstrated that Niopam is safe for use in pregnant women, it should be administered only if the procedure is considered essential by the physician.

Niopam is poorly excreted in human milk. From animal experience, Niopam is non toxic in animals after oral administration. Although, no serious adverse reactions have been reported in nursing infants, Niopam should be administered to lactating women only if considered essential by the physician.

There is no known effect on the ability to drive and operate machines. However, because of the risk of early reactions, driving or operating machinery is not advisable for one hour following the last injection.

The use of iodinated contrast media may cause untoward side effects. They are usually mild to moderate and transient in nature. However , severe and life threatening reactions sometimes leading to death have been reported.

Anaphylaxis (anaphylactoid reactions/hypersensitivity) may manifest with: mild localized or more diffuse angioneurotic oedema, tongue oedema, laryngospasm or laryngeal oedema, dysphagia, pharyngitis and throat tightness, pharyngolaryngeal pain, cough, conjunctivitis, rhinitis, sneezing, feeling hot, sweating increased, asthenia, dizziness, pallor, dyspnoea, wheezing, bronchospasm, and moderate hypotension. Skin reactions may occur in the form of various types of rash, diffuse erythema, diffuse blisters, urticaria, and pruritus. These reactions, which occur irrespective of the dose administered and the route of administration, may represent the first signs of incipient state of shock. Administration of the contrast medium must be discontinued immediately and – if necessary – specific treatment initiated via a venous access.

More severe reactions involving the cardiovascular system such as vasodilatation with pronounced hypotension, tachycardia, dyspnoea, agitation, cyanosis and loss of consciousness (syncope) may require emergency treatment.

Intravascular administration –Adults

The safety of Iopamidol injection through intravascular administration was evaluated in 2,548 adult patients involved in clinical trials.

The adverse reactions are classified by System Organ Class and frequency, using the following convention: 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), not known (cannot be estimated from the available data)

* Cardiac reactions may occur as consequences of the coronary catheterization procedural hazard: these complications include coronary artery thrombosis and coronary artery embolism.

** As with other iodinated contrast media, very rare cases of muco-cutaneous syndromes, including Stevens-Johnson syndrome, toxic epidermal necrolysis (Lyell syndrome) and erythema multiforme, have been reported following the administration of Iopamidol

*** Injection site pain and swelling may occur. In the majority of cases it is due to extravasation of contrast medium. These reactions are usually transient and result in recovery without sequelae. However, inflammation and even skin necrosis have been seen on very rare occasions. In isolated reports extravasation led to the development of compartment syndrome

Intravascular administration – Pediatric Population

Frequency type and severity of adverse reactions in children are similar to those in adults.

Treatment of overdosage is directed toward the support of all vital functions and the elimination of the contrast medium while maintaining the patient well hydrated.

If needed, haemodialysis can be used to eliminate Iopamidol from the body.

Pharmacotherapeutic group; ATC code: V08A B04

Iopamidol is contrast medium belonging to the new generation of non-ionic compound whose solubility is due to the presence of hydrophilic substitutes in the molecule. This results in a solution of low osmolality when compared with ionic media.

Iopamidol has been shown to be effective as an X-ray contrast medium in neuroradiology, angiography, venography, arthrography, urography, cerebral angiography and left ventriculography and coronary arteriography. Its toxicity particularly cardiac and CNS toxicity are less than those of ionic contrast media.

The pharmacokinetics of Iopamidol conform to an open two compartment pharmacokinetic model with first order elimination.

Distribution volume is equivalent to extracellular fluid.

Elimination is almost completely through the kidneys. Less that 1% of the administered dose has been recovered in the faeces up to 72 hours after dosing. Elimination is rapid; up to half the administered dose may be recovered in the urine in the first two hours of dosing.

There is no evidence of biotransformation.

Serum protein binding is negligible.

No adverse effects can be predicted from animal toxicology studies other than those documented from human use of Iopamidol.

Excipients are: are trometamol, hydrochloric acid and edetate calcium disodium.

No other drug should be mixed with the contrast medium.

5 years.

Protect from light.

5ml, 10ml and 20ml clear, colourless Type I glass ampoules.

30ml, 50ml, 100ml, 250ml and 200ml clear, colourless Type I or Type II glass bottles with rubber closures and aluminium caps.

Discard if the solution is not clear of particulate matter.

Exceptionally, the event of crystallisation of Niopam could occur. It has been shown that such a phenomenon is caused by a damaged or defective container and therefore the product should not be used in this case.

The bottle, once opened, must be used immediately.

Any residue of contrast medium must be discarded.

Niopam, as other iodinated contrast media, can react with metallic surfaces containing copper (e.g. brass), therefore the use of equipment, in which the product comes into direct contact with such surfaces, should be avoided.

Bracco U.K. Ltd,

Bracco House, Mercury Park,

Wycombe Lane, Wooburn Green,

Buckinghamshire HP10 OHH

PL 18920/0007

6^th October 1986 / 9^th January 2002

15 November 2011