⚠️ Important: This information is for education only. Never start, stop, or change any medication without consulting your doctor. This is NOT a prescription.
Over-the-counter (OTC)Antihistamine
Cetirizine
Brand names
CetzineAleridOkacet
Uses
Allergies — sneezing, runny nose, itching and hives.
How it works
Blocks H1 histamine receptors, reducing allergic symptoms.
Common side effects
- Drowsiness
- Dry mouth
Serious side effects
- Severe drowsiness (uncommon)
Who should not take it
Known allergy; severe kidney disease (dose adjust).
Drug interactions
Alcohol and sedatives increase drowsiness.
Storage
Store below 30°C.
Pregnancy category
B — No evidence of risk in humans
Sources: WHO