Clinically reviewed by Dr. Pipat Finn, M.D., Senior Doctor, Doctor Pattaya.
Last reviewed: August 2026
Metronidazole gel is a prescription antibiotic gel inserted directly into the vagina to treat bacterial vaginosis (BV). You use it once a day for five days, usually at bedtime. It clears BV in most women within a week. You need a confirmed diagnosis before starting, because this gel does nothing for a yeast infection or any other cause of vaginal symptoms.
You noticed something was off a day or two into your Pattaya trip. A thin, greyish discharge. An unfamiliar smell. Nothing alarming, but enough to pull your attention away from the beach. Heat, humidity, a change in routine, maybe a new partner — BV is one of the most common reasons women walk into our clinic mid-holiday, and there is nothing embarrassing about it. The tropical climate here genuinely disrupts the vaginal environment, and we see this regularly, from tourists in Jomtien to long-term expats in Pratumnak.
The good news is that BV is straightforward to diagnose and treat. Metronidazole gel is the standard first-line treatment, and it works well. This article covers what the gel does, how to use it safely, what to avoid while on it, and how to get it sorted here in Pattaya without losing days of your trip.
What Is BV and Why Does It Happen
BV is not a sexually transmitted infection, though sex can trigger it. The balance of bacteria inside the vagina shifts out of proportion. Healthy bacteria get crowded out by others, the vaginal pH rises, and symptoms follow: a fishy odour, thin discharge, sometimes mild irritation.
This can happen for all sorts of reasons. Heat and sweat in a tropical climate, new sexual partners, swimming in chlorinated pools, or changing hygiene products. Tourists and expats in Pattaya often hit several of these triggers at once, which is part of why we see so many cases.
Why Travellers and Expats in Pattaya Are at Higher Risk of BV
The climate here is not kind to vaginal flora. High humidity and heat make the microbiome easier to disrupt. Add disrupted sleep, alcohol, diet changes, and often new sexual partners, and you have a combination that regularly tips the balance.
Long-term expats are not immune. Many women who have lived here for years manage recurrent BV as a background issue. They know the signs, but still need a confirmed diagnosis and a proper prescription each time. Self-treating with over-the-counter remedies delays the right treatment and can make things worse.
Confirming BV Before Starting Metronidazole Gel
This is where people go wrong most often. They have Googled their symptoms, they are fairly confident it is BV, and they want the gel. The logic is understandable. But metronidazole gel will not touch a yeast infection, and a yeast infection with discharge and odour can look very similar from the outside.
A vaginal swab and a quick pH test confirm the diagnosis in the same visit. At Doctor Pattaya, we do this on the spot. You leave with the right medication the first time, not a second guess.
How to Use Metronidazole Gel for BV Correctly
The gel comes with a plastic applicator. You fill it, insert it into the vagina, and press the plunger. Most women find it easiest lying on their back with knees bent. Use it at bedtime so the gel stays in place while you sleep. One application per night for five nights.
Do not use tampons, vaginal douches, or other vaginal products during treatment. They disrupt the gel and reduce how well it works. A thin panty liner is fine for any leakage. Wash your hands before and after. In Pattaya’s heat, store the gel below 25 degrees Celsius — keep it in the hotel room fridge if your air conditioning is not running around the clock.
Symptoms, especially the odour and discharge, usually improve within two to three days. That does not mean the treatment is finished. Complete the full five-day course even if you feel fine by day two. Stopping early is one of the main reasons BV returns.
Gel vs. Tablets: Which Form Is Right for You
Both forms of metronidazole treat BV effectively. The choice usually comes down to your situation right now.
Oral tablets work throughout the body and are slightly more convenient to take. They also carry a higher risk of nausea, a stronger alcohol interaction, and a metallic taste that many people find unpleasant. The gel sits locally in the vaginal canal, less enters your bloodstream, and the side-effect profile is generally milder. For tourists on a Pattaya holiday who do not want to feel sick, the gel is often the more practical choice.
| Metronidazole Gel | Oral Metronidazole Tablets | |
|---|---|---|
| Route | Intravaginal applicator | Swallowed |
| Typical course | Once daily, 5 nights | Twice daily, 7 days |
| Systemic absorption | Low | High |
| Nausea risk | Lower | Higher |
| Alcohol interaction | Present, but lower risk | Strong — avoid during and 48 hours after |
| Metallic taste | Uncommon | Common |
| Best for | Local treatment with fewer systemic effects | Those who prefer tablets or have a clinical indication |
Some women prefer tablets, and some have clinical reasons to use one over the other. That is exactly what a face-to-face consultation is for.
Alcohol and Metronidazole Gel: Read This Before Your Next Drink
Do not drink alcohol while using metronidazole gel. Do not drink for at least 24 hours after your last dose either.
Metronidazole, even in gel form, is absorbed into the bloodstream in small amounts. Combined with alcohol, it can cause flushing, nausea, vomiting, and a racing heart. It is unpleasant and entirely avoidable. If you are on a Pattaya holiday and alcohol is part of the plan, say so honestly when you see the prescribing doctor. There are options, including timing the treatment around your schedule or discussing which form suits your circumstances best.
This is not a small-print footnote. It is one of the most important practical points for anyone treating BV here.
Side Effects to Know About
The gel is generally well tolerated. The most common issue is a secondary yeast infection, because the antibiotic disrupts vaginal flora before healthy bacteria can re-establish. If you develop thick, white, cottage-cheese-like discharge and significant itching after finishing the course, come back in. That is a yeast infection and it needs a different treatment.
Other possible side effects include mild vaginal irritation, a slight metallic taste, and occasional abdominal discomfort. Serious reactions are rare. If you notice severe pelvic pain, fever, or symptoms that worsen during the course, get assessed the same day.
What Happens If BV Keeps Coming Back
Recurrent BV is real and genuinely frustrating. A significant proportion of women see it return within three months of successful treatment. If this is happening to you, one short course of gel will not be the long-term answer.
At Doctor Pattaya, we look at the full picture for women dealing with repeated episodes. That includes reviewing sexual practices, hygiene habits, and whether a longer or repeated low-frequency course of metronidazole is appropriate. We can also discuss the evidence on probiotics and vaginal pH products, though the evidence here is moderate rather than strong. Expats who have been managing recurrent BV for months should book a proper consultation, not just ask for another prescription.
Getting Metronidazole Gel for BV at Doctor Pattaya
Metronidazole gel is prescription-only in Thailand. You will not get the right product from a pharmacy counter without a consultation, and you should not want to — a confirmed diagnosis comes first.
At Doctor Pattaya, the process is simple. Walk in any time, day or night. We take a vaginal swab and check your pH. If BV is confirmed, we prescribe and dispense the metronidazole gel the same day. The whole visit usually takes under an hour. We also offer full STD testing alongside if you want a complete screen, which many patients find sensible at the same time — you can read more about our STD testing service in Pattaya if you want to know what that involves.
For anyone who cannot travel to the clinic, our STD treatment service includes doctor hotel visits across Pattaya, Jomtien, and Naklua. No need to lose a day of your trip to sort this out. If you are unsure whether your symptoms are BV or something else, we can rule in or out other causes at the same visit, including infections that produce similar discharge patterns. A clear answer is faster than Googling.
If you have BV symptoms, do not wait. Doctor Pattaya is open 24 hours a day, seven days a week, and offers same-day vaginal swab testing and metronidazole gel prescription for bacterial vaginosis where clinically appropriate. Walk in at any time, or call ahead if you prefer. Doctor hotel visits are available across Pattaya, Jomtien, and Naklua for patients who cannot travel to the clinic. Confidential, fast, and done properly the first time.
FAQ
Dr. Pipat Finn is the senior doctor at Doctor Pattaya Takecare Clinic, a 24/7 walk-in medical practice on South Pattaya Road, Chonburi, Thailand. They provide primary care, travel medicine, sexual health, vaccination, minor surgery, IV therapy, and emergency outpatient services for tourists, expatriates, and Pattaya residents. Languages: English and Thai. WhatsApp consultations: +66 95 073 5550. Call: +66 81 668 5557.
