About tetracycli ne
Tetracycline antibiotic
Used for
- Treats certain bacterial infections, including acne and chlamydia.
- Not effective against viral infections such as colds or flu.
Usual adult dose
Commonly 250–500 mg by mouth every 6 hours; dose depends on infection.
Usual dose in children
Generally avoided in children under 8; specialist-directed use may be needed for serious infections.
Common side effects
- Nausea, vomiting, or diarrhea
- Sun sensitivity
- Esophageal irritation
- Tooth discoloration during tooth development
Important warnings
- Avoid during pregnancy and in children under 8 unless specifically directed.
- Take with plenty of water; remain upright afterward.
- Antacids, iron, calcium, and dairy can reduce absorption; separate doses.
- Complete the prescribed course; misuse can promote antibiotic resistance.
Pregnancy
Generally avoided because it can affect fetal bone and tooth development.
Breastfeeding
Usually avoided or used only when clearly necessary; seek professional guidance.
Interactions
- Antacids and supplements containing iron, calcium, magnesium, or zinc reduce absorption.
- Dairy products may reduce absorption.
- Warfarin effects may increase.
- Retinoids such as isotretinoin may increase risk of raised pressure around the brain.
AI-generated from general medical knowledge, not from this product's official leaflet. It may be incomplete or out of date. Not medical advice — ask a pharmacist or doctor before making any decision.