For children between 1 to 2 years of age, your doctor will use their weight or age to work out the right dose. In an interaction study in healthy subjects with intranasal fluticasone propionate, ritonavir (a highly potent cytochrome P450 3A4 inhibitor) 100 mg b.i.d. increased the fluticasone propionate plasma concentrations several hundred fold, resulting in markedly reduced serum cortisol concentrations. Cases of Cushing's syndrome and adrenal suppression have been reported. The combination should be avoided unless the benefit outweighs the increased risk of systemic glucocorticoid side-effects. Treatment should be stopped or the advice of a doctor sought if an improvement is not seen within 7 days. The advice of a doctor or pharmacist should also be sought if symptoms have improved but are not adequately controlled.

If your eyes still feel dry, irritated or itchy after taking oral tablets, you might want to supplement treatment with eye drops. You can buy “drowsy” antihistamines without a prescription, too. Chlorphenamine maleate is the active ingredient in Piriton Syrup, which is one of the few hay fever treatments suitable for young children.It's fine to take cetirizine in combination with other types of medicine for hay fever, for example nasal sprays or eye drops. In a six-week, placebo-controlled study of 186 patients with allergic rhinitis and concomitant mild to moderate asthma, cetirizine 10 mg once daily improved rhinitis symptoms and did not alter pulmonary function. This study supports the safety of administering cetirizine to allergic patients with mild to moderate asthma. Children under 18 years of age: Should not be used by children and adolescents under 18 years of age. Children aged 1-2 years: Give one small 2.5ml spoonful twice daily. Maximum Daily Dose: 2 small 2.5ml spoonfuls (5ml)

You can take cetirizine with or without food, but always take the tablets or capsules with a drink of water, milk or squash. Swallow them whole. Do not chew them. 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. After discontinuation of cetirizine, pruritus (intense itching) and/or urticaria have been reported (see Section Warnings and Precautions).

The best hay fever treatments you can buy in 2023 1. Benadryl Allergy Relief Capsules: Best hay fever tablets to relieve multiple symptoms fast