Second-generation H1 antihistamine
How to take Cetirizine tablets correctly
How a tablet is swallowed matters for absorption, gastric tolerance and avoiding oesophageal irritation. Cetirizine (Cetirizine) at 5mg, 10mg is straightforward to take for most adults but a few practical points reduce variability and minimise local side effects.
Standard administration of Cetirizine
Most tablet, oral solution, orodispersible tablet of Cetirizine are taken whole with a full glass of water (about 200 mL). Sitting or standing upright for 10–15 minutes after dosing reduces the risk of the tablet lodging in the oesophagus and causing local irritation. Sufficient water carries the medication into the stomach where dissolution and absorption begin.
Practical tips and what to avoid
According to the prescribing information for Cetirizine, taking Cetirizine with too little water or while lying down increases oesophageal exposure and can cause heartburn-like irritation in susceptible users. Lukewarm or cool water is preferable to very hot water. Tablets should not be chewed unless explicitly authorised by the prescriber for the formulation; Cetirizine selectively blocks peripheral H1 histamine receptors, antagonising the effects of histamine released by mast cells during allergic responses.
Frequently asked questions
How much water should I take with Cetirizine? ▾
A full glass — about 200 mL — is the standard recommendation for Cetirizine at 5mg, 10mg. Less water increases the risk of the tablet sticking on the way down and causing local irritation.
Can I take Cetirizine without water? ▾
It is not advisable. Tablets without water can lodge in the oesophagus and cause local irritation; some formulations require water for proper dissolution. Always take Cetirizine with adequate water unless the formulation explicitly says otherwise.
Products containing Cetirizine
More on Cetirizine
- With alcoholCetirizine and alcohol — is it safe to drink?
- With foodShould Cetirizine be taken with food?
- Side effectsCetirizine side effects: common, rare and warning signs
- Dosage guideCetirizine dosage guide: how much to take and when
- OnsetHow fast does Cetirizine start working?
- DurationHow long does Cetirizine last?
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.