About oxytetracycline
Tetracycline antibiotic
Used for
- Treats certain susceptible bacterial infections, including acne and some respiratory or skin infections.
- Treats chlamydia and some other infections when appropriate.
Usual adult dose
Commonly 250–500 mg by mouth every 6 hours; dose and duration depend on infection.
Usual dose in children
Generally avoided in children under 8 years; specialist-directed use may be needed for serious infections.
Common side effects
- Nausea, vomiting, diarrhoea, or stomach discomfort
- Sunlight sensitivity
- Irritation or ulcers of the food pipe
- Tooth discolouration during tooth development
Important warnings
- Use only for bacterial infections; it does not treat colds or flu.
- Avoid taking with milk, antacids, or iron, which reduce absorption.
- Take with plenty of water and remain upright after taking.
- Can cause severe sun sensitivity; limit sunlight and use protection.
Pregnancy
Usually avoided, particularly after the first trimester, because it can affect developing teeth and bones.
Breastfeeding
Generally avoided or used only after clinical assessment; it may affect an infant’s teeth and bones.
Interactions
- Antacids, calcium, iron, magnesium, and zinc reduce absorption.
- Warfarin may have stronger effects.
- Retinoids such as isotretinoin increase risk of raised pressure in the skull.
- Penicillin antibiotics may work less effectively when used together.
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 It may be incomplete or out of date.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.