← Drug quick-reference

Cetirizine

Brand: Zyrtec

Antihistamine (2nd-gen)Used for: AllergiesRespiratory & Allergy

Common side effects

  • Drowsiness
  • Dry mouth
  • Fatigue
  • Headache

Key interactions & cautions

  • Alcohol adds to drowsiness
  • Other sedatives increase drowsiness

Counseling points

  • May cause some drowsiness
  • May be taken with or without food
  • One dose lasts 24 hours
  • Use caution driving until you know its effect
  • Avoid alcohol
← Budesonide/formoterolDiphenhydramine →

High-yield study aid for exam prep — not a substitute for the package insert or a pharmacist’s dispensing reference.