UK Prescribing Information: Targaxan 550mg (rifaximin-α)
REFER TO FULL SUMMARY OF PRODUCT CHARACTERISTICS (SmPC) BEFORE PRESCRIBING
Film-coated tablet containing rifaximin 550 mg.
Targaxan is indicated for the reduction in recurrence of episodes of overt hepatic encephalopathy in patients ≥ 18 years of age.
Dosage and administration:
Recommended dose: 550mg twice daily as long term treatment for the reduction in recurrence of overt episodes of overt hepatic encephalopathy.
In the pivotal study, 91% of patients were using concomitant lactulose.
TARGAXAN can be administered with a glass of water, with or without food.
No dosage changes are necessary in the elderly or those with hepatic insufficiency. Use with caution in patients with renal impairment.
The safety and efficacy in paediatric patients (aged less than 18 years) have not been established.
Contraindicated in hypersensitivity to rifaximin, rifamycin-derivatives or to any of the excipients and in cases of intestinal obstruction.
Warnings and precautions for use:
The potential association of rifaximin treatment with Clostridium difficile associated diarrhoea and pseudomembranous colitis cannot be ruled out.
The administration of rifaximin with other rifamycins is not recommended.
Rifaximin may cause a reddish discolouration of the urine.
Use with caution in patients with severe (Child-Pugh C) hepatic impairment and in patients with MELD (Model for End-Stage Liver Disease) score > 25.
In hepatic impaired patients, rifaximin may decrease the exposure of concomitantly administered CYP3A4 substrates (e.g. warfarin, antiepileptics, antiarrhythmics, oral contraceptives).
Both decreases and increases in international normalized ratio (in some cases with bleeding events) have been reported in patients maintained on warfarin and prescribed rifaximin. If co-administration is necessary, the international normalized ratio should be carefully monitored with the addition or withdrawal of treatment with rifaximin. Adjustments in the dose of oral anticoagulants may be necessary to maintain the desired level of anticoagulation.
Ciclosporin may increase the rifaximin Cmax.
This medicine contains less than 1 mmol sodium (23 mg) per tablet, that is to say essentially ‘sodium-free’.
Pregnancy and lactation:
Rifaximin is not recommended during pregnancy.
The benefits of rifaximin treatment should be assessed against the need to continue breastfeeding.
Common effects reported in clinical trials are dizziness, headache, depression, dyspnoea, upper abdominal pain, abdominal distension, diarrhoea, nausea, vomiting, ascites, rashes, pruritus, muscle spasms, arthralgia and peripheral oedema.
Other effects that have been reported include:
Clostridial infections, urinary tract infections, candidiasis, pneumonia cellulitis, upper respiratory tract infection and rhinitis. Blood disorders (e.g. anaemia, thrombocytopenia). Anaphylactic reactions, angioedemas, hypersensitivity. Anorexia, hyperkalaemia and dehydration. Confusion, sleep disorders, balance disorders, convulsions, hypoesthesia, memory impairment and attention disorders. Hypotension, hypertension and fainting. Hot flushes. Breathing difficulty, pleural effusion, COPD. Gastrointestinal disorders and skin reactions. Liver function test abnormalities. Dysuria, pollakiuria and proteinuria. Oedema. Pyrexia. INR abnormalities.
Prescribers should consult the SmPC in relation to all adverse reactions.
Legal category: POM
Cost: Basic NHS price £259.23 for 56 tablets
Marketing Authorisation holder: Norgine Pharmaceuticals Limited, Norgine House, Widewater Place, Moorhall Road, Harefield, Uxbridge, UB9 6NS, UK
Marketing Authorisation number: PL 20011/0020
For further information contact:
Norgine Pharmaceuticals Limited
Telephone: 01895 826 606
Date of preparation: April 2021