Metronidazole UK: What It Is and When You Need It

Metronidazole is an antibiotic that fights certain bacteria and parasites. In the UK you’ll see it prescribed for infections like bacterial vaginosis, giardiasis, amoebic liver abscess and dental infections. It’s a prescription‑only medicine because the right dose matters a lot and misuse can cause resistance.

If you’ve been given a script, you’re probably dealing with a nasty infection that needs a drug that gets into tissue quickly. Metronidazole works by stopping the DNA of the microbes from copying, which kills them off. Most people feel better within a few days, but finishing the whole prescription is crucial.

Correct Dosage and How to Take It

Typical adult dosing in the UK ranges from 250 mg to 500 mg taken two to three times a day, depending on the infection. For giardiasis the schedule is often 250 mg three times daily for five days, while bacterial vaginosis may use 500 mg twice daily for seven days. Children get a dose based on weight, usually 7.5 mg per kilogram of body weight, split into two doses.

Take the tablets with food or a glass of water to avoid stomach upset. If you’re using the liquid form, shake the bottle well and use a proper measuring device – teaspoons aren’t accurate enough. Don’t crush or chew extended‑release tablets; they’re designed to release the drug slowly.

Alcohol is a big no‑no while you’re on Metronidazole. Even a small amount can cause flushing, nausea, rapid heartbeat and a pounding headache – the classic “disulfiram‑like” reaction. This can linger for up to 48 hours after your last dose, so steer clear of drinks, cooking wine and even mouthwash that contains alcohol.

Buying Metronidazole Safely in the UK

If you need to refill, start with a licensed UK pharmacy. You can order through NHS repeat prescription services or choose a reputable private pharmacy that asks for a valid prescription. Online pharmacies are convenient, but make sure they’re registered with the General Pharmaceutical Council (GPhC). Look for the GPhC logo and a clear pharmacy address.

When you shop online, avoid sites that promise “no prescription needed” or ultra‑low prices. Those usually sell fake or sub‑standard products that can be dangerous. A good online pharmacy will ask you to upload a photo of your doctor’s script, confirm your identity, and give you a clear price breakdown including delivery.

Keep an eye on the expiry date and storage instructions. Metronidazole tablets should stay dry and at room temperature. If you notice any discoloration, breakage, or a strange smell, contact the pharmacy before taking the medicine.

Finally, know the red flags: sudden dizziness, severe rash, itching, or yellowing of the skin or eyes could mean a serious reaction. Call your GP or go to A&E if these happen. Mild side effects like a metallic taste, mild nausea or headache are common and usually pass once the course finishes.

Metronidazole is a powerful tool against specific infections, but it works best when you follow the dosage, avoid alcohol, and get it from a trusted source. If you stay on top of these basics, you’ll clear the infection without extra hassle. Have questions about your prescription? Talk to your pharmacist – they’re a great resource for dosage tweaks, side‑effect management, and finding a reliable UK pharmacy.