Zirtek Allergy Relief are for oral use only and should be taken with water. The recommended dose is to take one tablet once a day. The tablets should not be chewed.

If you take too many tablets you should contact your doctor or A&E immediately. If you forget a dose, take the next dose when needed provided you only take a maximum of one capsules in a 24 hour period. Do not double dose.

The active ingredient in Zirtek Allergy Relief is Cetirizine. Other ingredients include microcrystalline cellulose, lactose monohydrate, colloidal anhydrous silica, magnesium stearate The film coat contains hydroxypropylmethylcellulose, titanium dioxide (E171) and polyethlene glycol.

Zirtek Allergy Relief should not be taken if you are allergic to any of the ingredients in the medicine. You should not take the tablets if you have had an allergic reaction to any other antihistamines or if you have moderate or serious kidney problems. Speak to your doctor or pharmacist before taking the tablets if you are epileptic or at risk of convulsions.You should make sure to mention if you are taking any other medicines, including medicines obtained without a prescription. You should speak to your doctor or pharmacist if you are pregnant or breast-feeding before taking these tablets.

As with all medicines, Zirtek Allergy Relief can cause side effects, although not everybody gets them. You should stop using Zirtek immediately if you notice any signs of an allergic reaction. If you experience convulsions or bruising or bleeding more easily than normal, stop taking the tablets and seek immediate medical help. If you experience confusion, hallucinations, abnormal liver function tests, rapid heartbeat or loss of consciousness, stop taking the medicine and speak to your doctor, Other side effects may include headache or dizziness, drowsines or tiredness, restlessness, dry mouth, sore throat, upset stomach, abdomincal pain, diarrhoea, nausea, runny nose, agitation, weakness, malaise, insomnia, pins and needles, itching, rash or hives, aggression, depression, weight gain, swelling, movement disorders including tremor, muscle spasm and tics, taste disorder, blurred vision, eye movement disorder and difficult, painful or involuntary urination.

If any of these side effects get serious, or you get side effects not listed above, please speak to your doctor or pharmacist.