If you or your child's symptoms do not get better within a few days, talk to a doctor. Dosage and strength

It's fine to take cetirizine in combination with other types of medicine for hay fever, for example nasal sprays or eye drops. The standard dosage for oral antihistamine is 1mg per kg of your dog’s body weight. This depends on the exact antihistamine though, as does the number of times it needs to be taken as it could be once, twice, or three times a day. Is Piriteze the same as Piriton? In a placebo-controlled study, cetirizine give at the high daily dose of 60 mg for seven days did not cause statistically significant prolongation of QT interval.Chlorphenamine, in common with other drugs having anticholinergic effects, should be used with caution in epilepsy; raised intra-ocular pressure including glaucoma; prostatic hypertrophy; severe hypertension or cardiovascular disease; bronchitis, bronchiectasis and asthma; hepatic impairment; renal impairment. Children and the elderly are more likely to experience the neurological anticholinergic effects and paradoxical excitation (eg. Increased energy, restlessness, nervousness). Avoid use in elderly patients with confusion. Atarax is a prescription-only antihistamine and cannot be sold over the counter but it is one of the most effective antihistamines available. Dosing is at 1mg per pound of bodyweight 2-3 times a day. If you have kidney problems as you may need to take a lower dose (see How to take Piriteze Allergy Relief Syrup).

Treating allergies such as hay fever, pet allergies and dust mite allergies (seasonal and perennial allergic rhinitis). headaches – make sure you rest and drink plenty of fluids. Ask your pharmacist to recommend a painkiller. Talk to your doctor if the headaches last longer than a week or are severe. One key difference between piriton and piriteze allergy tablets are their active ingredients. Though both are part of the drug group known as antihistamines, they are different drugs. Piriton has the active ingredient chlorphenaminewhile Piriteze contains the active ingredient cetirizine hydrochloride. Do not use if MAOI medication is being taken, or if there is known hypersensitivity to antihistamines Concurrent use with drugs which cause sedation such as anxiolytics and hypnotics may cause an increase in sedative effects, therefore medical advice should be sought before taking chlorphenamine concurrently with these medicines.If the allergen can be identified and removed, then treatment for an allergic reaction can be avoided but this is often not possible to do.

Adults and children 12 years and over: 10ml (4mg) every 4 to 6 hourly. Maximum daily dose: 60ml (24mg) in any 24 hours. To find out how much Piriton you can give your dog you should consult your veterinarian and always follow their advice closely.Pruritus and/or urticaria may occur when cetirizine is stopped, even if those symptoms were not present before treatment initiation (see Section Adverse Reactions). In some cases, the symptoms may be intense and may require treatment to be restarted. The symptoms should resolve when the treatment is restarted. If you or your child has been prescribed chlorphenamine, follow your doctor's instructions about how and when to take it. Carcinogenesis and mutagenesis: In a 2-year carcinogenicity study in rats, cetirizine was not shown to be carcinogenic at dietary doses up to 20 mg/kg (approximately 15 times the maximum recommended daily oral dose in adults). In a 2-year carcinogenicity study in mice, cetirizine administration lead to an incidence of benign liver tumors in males at a dietary dose of 16 mg/kg (approximately 6 times the maximum recommended daily oral dose in adults). The clinical significance of these findings during long-term use of cetirizine is unknown at this time . This is why, as with all medicine that is traditionally made for humans, it’s important to be very cautious and to seek veterinary advice.