Oxytetracycline

Oxytetracycline is a prescription-only oral antibiotic belonging to the tetracycline family, and it's one of the longest-established treatments for mild to moderate acne in the UK. It works by killing the bacteria responsible for blocked pores and inflamed spots, and also has mild anti-inflammatory properties that help to calm redness and swelling. It is particularly effective for widespread acne on the face, chest, and back. For the best results, oxytetracycline is usually prescribed alongside a topical acne cream or gel. A consultation with one of our clinicians at Access Doctor is required before it can be prescribed.

The usual dose for acne is two 250mg tablets, twice a day — one dose in the morning and one in the evening. It is very important to take oxytetracycline on an empty stomach — either one hour before eating or two hours after a meal. Food, particularly dairy products such as milk, yoghurt, and cheese, significantly reduces how well the tablet is absorbed by your body and makes it less effective. Always swallow the tablets with a full glass of water and avoid lying down for at least 30 minutes after taking them to prevent throat irritation. Also avoid taking indigestion remedies or supplements containing iron, magnesium, or zinc at the same time, as these also reduce absorption.

Oxytetracycline starts working straight away, but visible improvements to your skin typically take longer to appear. Most people begin to notice a meaningful difference within 4 to 6 weeks of consistent daily use, with the full benefit usually seen after 12 weeks. For some people with more severe acne, treatment may need to continue for up to 6 months or longer. It is crucial to keep taking oxytetracycline regularly and to complete the full prescribed course, even if your skin starts to clear up sooner — stopping early can allow the bacteria to return and your acne to flare up again.

Yes — like all tetracycline antibiotics, oxytetracycline can increase your skin's sensitivity to sunlight, making it more prone to burning, redness, and skin reactions even after relatively brief sun exposure. While taking oxytetracycline, apply a broad-spectrum sunscreen with at least SPF 30 every day, wear protective clothing in strong sunlight, and avoid sunbeds completely. If you notice an unusual skin reaction after sun exposure, speak to your doctor or one of our clinicians at Access Doctor.

Most people tolerate oxytetracycline well and experience no significant side effects. The most commonly reported ones are nausea, stomach discomfort, and diarrhoea — taking the tablets on an empty stomach with a full glass of water and sticking to simple, non-fatty foods can help to reduce these effects. Some women may experience thrush during treatment, which can be treated separately if needed. In rare cases, more serious side effects can occur, including severe headaches, blurred vision, or a severe skin rash — if you experience any of these, stop taking oxytetracycline immediately and contact your GP.

Moderate alcohol consumption is unlikely to significantly reduce the effectiveness of oxytetracycline. However, alcohol may make certain side effects — such as nausea, stomach upset, and dizziness — feel worse. It's sensible to keep alcohol to a minimum during your course of treatment and to avoid binge drinking altogether.

This is an important question. During the first three weeks of taking oxytetracycline, the combined oral contraceptive pill may be less effective, so additional contraception such as condoms should be used during this initial period. After three weeks, antibiotic resistance develops and additional precautions are generally no longer necessary — but always follow the specific advice of your clinician. If you experience significant vomiting or diarrhoea while taking oxytetracycline, use additional contraception until your next period as absorption of the pill may be affected.

No — oxytetracycline is not safe during pregnancy or breastfeeding. Like all tetracycline antibiotics, it can cause permanent staining of the developing baby's teeth and may affect bone development. If you discover you are pregnant while taking oxytetracycline, stop immediately and contact your GP. It is also not recommended while breastfeeding as it can pass into breast milk. If you need acne treatment during pregnancy or while breastfeeding, speak to your GP who can advise on safe alternatives such as erythromycin.