Fexofenadine
Brand: Allegra
Common side effects
- Headache
- Nausea
- Drowsiness
- Dizziness
- Back pain
Key interactions & cautions
- Fruit juices reduce its absorption
- Antacids with aluminum or magnesium lower levels
- Less sedating than older antihistamines
- Few major drug interactions
Counseling points
- Take with water, not fruit juice
- Separate from antacids by a couple hours
- May take with or without food
- Less likely to cause drowsiness
- Take as needed for allergy symptoms
High-yield study aid for exam prep — not a substitute for the package insert or a pharmacist’s dispensing reference.