Doxycycline — Drug Interactions, Alcohol & Pregnancy Guide
Last reviewed: · Source: US FDA drug label database · 247CanITakeWith Editorial Team
- Doxycycline is a Tetracycline antibiotic used for Chest infections.
- Alcohol: Avoid regular alcohol with doxycycline — it can reduce the antibiotic's effectiveness and worsen nausea, a common side effect.
- Pregnancy: Avoid doxycycline in pregnancy — tetracyclines deposit in developing teeth and bones; safer antibiotics exist for almost every infection.
- This page covers 1 specific drug combination with Doxycycline.
About Doxycycline
Doxycycline is a versatile tetracycline antibiotic. It should be taken with plenty of water and remain upright for 30 minutes to avoid oesophageal irritation. Avoid dairy and antacids within 2 hours. Causes photosensitivity — use sunscreen.
Also sold as: Vibramycin, Doxylar, Periostat
Doxycycline at a glance
Doxycycline is classed as tetracycline antibiotic and is used for chest infections, acne, malaria prophylaxis, rosacea, stis, lyme disease. It is a prescription medicine, so doses and combinations should always be agreed with your prescriber or pharmacist.
Typical adult dosing guidance: 100mg twice daily (standard); 200mg loading dose on first day. Your own label or prescription always takes priority over general figures.
Interactions most often flagged
- Alcohol
- Dairy
- Antacids
- Pregnancy (contraindicated)
Before you combine Doxycycline with anything new
- Read the patient information leaflet for both products.
- Keep one up-to-date list of every medicine and supplement you take.
- Ask a pharmacist — it is free and takes a couple of minutes.
- Seek urgent medical help if you feel seriously unwell after combining medicines.
Doxycycline and Alcohol
Avoid regular alcohol with doxycycline — it can reduce the antibiotic's effectiveness and worsen nausea, a common side effect.
Full guide →Doxycycline in Pregnancy
Avoid doxycycline in pregnancy — tetracyclines deposit in developing teeth and bones; safer antibiotics exist for almost every infection.
Full guide →Doxycycline — Drug Combinations
More in this category: antibiotics
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Frequently Asked Questions
What is Doxycycline used for?
Doxycycline is a Tetracycline antibiotic used for Chest infections, Acne, Malaria prophylaxis, Rosacea, STIs, Lyme disease.
What is the maximum adult dose of Doxycycline?
The maximum adult dose is 100mg twice daily (standard); 200mg loading dose on first day. This is general guidance — always follow the dose on your prescription or product label, and check with a pharmacist if you're unsure.
Can I drink alcohol with Doxycycline?
Avoid regular alcohol with doxycycline — it can reduce the antibiotic's effectiveness and worsen nausea, a common side effect.
Is Doxycycline safe to take during pregnancy?
Avoid doxycycline in pregnancy — tetracyclines deposit in developing teeth and bones; safer antibiotics exist for almost every infection.
Is Doxycycline available over the counter in the UK?
Doxycycline is prescription-only in the UK.
What should I check before taking Doxycycline with other medicines?
The interactions most often flagged for Doxycycline are: alcohol, dairy, antacids, pregnancy (contraindicated). Tell your pharmacist or prescriber about everything you take, including over-the-counter products, supplements and herbal remedies, before combining it with anything new.
What are the brand names for Doxycycline?
Doxycycline is sold under brand names including Vibramycin, Doxylar, Periostat. The active ingredient is the same, so check labels carefully to avoid doubling up on it.
Do I need a prescription for Doxycycline?
Doxycycline is a prescription medicine, so take it exactly as your prescriber directed and ask them before changing the dose.
Not sure if Doxycycline is safe with your other medications?
HealthLabs.com lets you check liver enzyme or kidney function levels before combining medications long-term — no GP referral needed.
Check your levels at HealthLabs →Always speak to your pharmacist or GP for personalised medical advice. Affiliate link — we may earn a commission.