← Drug quick-reference

Omeprazole

Brand: Prilosec

Proton pump inhibitorUsed for: GERD, ulcersGastrointestinal

Common side effects

  • Headache
  • Diarrhea
  • Stomach pain
  • Nausea
  • Gas

Key interactions & cautions

  • Reduces effect of clopidogrel
  • May reduce absorption of some drugs needing acid
  • May increase certain drug levels
  • Long-term use may lower magnesium

Counseling points

  • Take before a meal, usually morning
  • Swallow capsule whole; do not crush
  • May take 1-4 days for full relief
  • Report ongoing use beyond directed time
  • Long-term use may affect magnesium or B12

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