Lariam (Mefloquine) – What You Need to Know

If you’re planning a trip to a malaria‑risk area, you’ve probably heard of Lariam. Its generic name is mefloquine, and doctors prescribe it to keep malaria away before, during, and after travel. It works by staying in your blood long enough to kill the parasite if you get bitten by an infected mosquito. Knowing how to use it right can save you a lot of trouble, so let’s break down the basics.

How to Take Lariam Correctly

The usual schedule is a single dose taken once a week. For most adults, that means a 250 mg tablet on Monday, then the same dose on Thursday, and one more on the following Monday. Start the first dose at least two weeks before you leave the malaria zone, and keep taking it for four weeks after you return. If you miss a dose, take it as soon as you remember—unless it’s almost time for the next one, then just skip the missed dose and get back on schedule. Don’t double up; that can raise the risk of side effects.

Swallow the tablet with a full glass of water. Food isn’t required, but if you have a stomach that’s sensitive, taking it with a snack can help. Avoid alcohol while you’re on Lariam because it can heighten dizziness or nausea.

When to Call Your Doctor

Most people handle Lariam without big problems, but you should be on the lookout for a few red flags. Common side effects include mild nausea, headache, dizziness, or trouble sleeping. These usually fade after the first few doses. If you notice vivid dreams, ringing in the ears, or a feeling of being “off,” let your doctor know; they might adjust the dose or suggest a different malaria pill.

Serious reactions are rare but need immediate attention. Watch for severe anxiety, depression, hallucinations, or thoughts of self‑harm. Also, sudden heart rhythm changes, severe allergic reactions (hives, swelling, trouble breathing), or persistent vomiting require a call to a medical professional right away.

Drug interactions matter, too. Tell your doctor about any other meds you’re taking—especially antacids, antidepressants, or other malaria drugs. Some antibiotics and anti‑seizure medicines can mess with mefloquine levels, making side effects more likely.

Pregnant women should avoid Lariam unless the benefits clearly outweigh the risks, and it’s not recommended for breastfeeding moms either. If you’re unsure whether Lariam fits your health profile, a quick chat with your pharmacist can clear things up.

Finally, keep your Lariam supply in a cool, dry place and check the expiration date before each trip. Throw away any tablets that look discolored or cracked.

With the right timing and a bit of awareness, Lariam can be an effective shield against malaria. Stay informed, follow the schedule, and reach out to your healthcare provider if anything feels off. Safe travels!