Cautions with other medicines
Some medicines can increase the chances of you having side effects with cetirizine.
Check with your pharmacist or doctor if you're taking any medicine that makes you drowsy, gives you a dry mouth, or makes it difficult for you to pee. Taking cetirizine might make these side effects worse.
Mixing cetirizine with herbal remedies and supplements
There might be a problem taking some herbal remedies and supplements alongside cetirizine, especially ones that cause sleepiness, a dry mouth, or make it difficult to pee.
There's not enough information to say that other complementary medicines and herbal remedies are safe to take with cetirizine. They're not tested in the same way as pharmacy and prescription medicines. They're generally not tested for the effect they have on other medicines.
Important: Medicine safety
Tell your doctor or pharmacist if you're taking any other medicines, including herbal remedies, vitamins or supplements.