Metronidazole – What It Is and When It’s Used

Metronidazole is an antibiotic that fights bacteria and parasites. Doctors often prescribe it for infections like bacterial vaginosis, trichomoniasis, and certain gut bugs such as Clostridioides difficile. It’s also the go‑to drug for dental infections and some skin conditions. If you’ve ever been told to finish a “purple pill” after a dental procedure, that was probably metronidazole.

How to Take Metronidazole Safely

Take metronidazole exactly as your doctor says. Usually you’ll swallow a tablet with a full glass of water. The dose depends on the infection – a common adult schedule is 500 mg every 8 hours for 7 to 10 days. For some skin infections a single dose might be enough. Don’t skip doses; missing a few can let the infection bounce back.

Never mix metronidazole with alcohol. Even a small drink can cause a nasty flushing reaction, rapid heartbeat, and nausea. If you’re on other meds, check with your pharmacist – metronidazole can interact with warfarin, lithium, and some seizure drugs.

Common Side Effects and What to Watch For

Most people feel fine, but a few notice a metallic taste, mild nausea, or a headache. These usually fade after a day or two. If you get severe stomach pain, dark stools, or a rash, call your doctor right away. Rarely, metronidazole can cause seizures or liver problems, so any sudden confusion or yellow skin should be reported immediately.

Because metronidazole can affect your gut flora, some folks develop mild diarrhea. Eating probiotic‑rich foods like yogurt can help keep your digestion smooth while you finish the course.

Store the tablets at room temperature, away from moisture and heat. If a tablet breaks, crush it and mix with a spoonful of applesauce – but only if your doctor says it’s okay.

In short, metronidazole works fast and is safe when you follow the directions. Keep the bottle handy, finish the whole pack, avoid alcohol, and watch for any unusual symptoms. If you have questions, a quick call to your pharmacy can clear up most doubts without the hassle of another doctor visit.