Alternatives to Mefloquine if You Can't Fill Your Prescription

You've been prescribed mefloquine for malaria prophylaxis, but your pharmacy is out of stock — and so are the next three you called. What do you do? Fortunately, you have good options. Several other antimalarial medications are FDA-approved, effective, and generally more widely available at standard pharmacies. The right choice depends on your destination, health history, and travel timeline.

Here is a practical comparison of mefloquine alternatives, with what you need to know about each.

Are Mefloquine Alternatives Actually as Effective?

Yes. Research has consistently found that mefloquine, atovaquone-proguanil, and doxycycline are all equally effective at preventing malaria among short-term travelers. The main differences are in dosing schedule, side effect profile, cost, and suitability for specific populations. Your destination matters, too — mefloquine resistance is widespread in parts of Southeast Asia, making alternatives not just an option there but the preferred choice.

Alternative 1: Atovaquone-Proguanil (Malarone)

Atovaquone-proguanil, sold under the brand name Malarone, is the most commonly recommended alternative to mefloquine. It combines two drugs — atovaquone and proguanil — that attack the malaria parasite at multiple stages of its life cycle, including the liver stage (causal prophylaxis).

Dosing: 1 tablet daily, starting 1-2 days before travel, during travel, and only 7 days after returning (vs. 4 weeks for mefloquine)

Advantage: Shorter post-travel course; generally well tolerated; better for short trips

Disadvantage: More expensive (generic Malarone can cost $80-$150+ for a month's supply); not recommended in pregnancy or for infants under 5 kg

Best for: Short-trip travelers, people who can't tolerate mefloquine, travel to Southeast Asia (where mefloquine resistance is common)

Alternative 2: Doxycycline

Doxycycline is a tetracycline antibiotic with proven antimalarial activity. It is typically the least expensive option and is effective in chloroquine-resistant areas worldwide, including Southeast Asia.

Dosing: 100 mg daily, starting 1-2 days before travel, during travel, and 4 weeks after returning

Advantage: Cheapest option; also provides protection against other travel illnesses (some Rickettsial infections, leptospirosis)

Disadvantage: Daily dosing; photosensitivity (sun sensitivity); stomach upset; NOT safe during pregnancy or in children under 8 years old; can cause yeast infections

Best for: Budget-conscious travelers, hikers/campers in endemic areas, those who prefer a low cost option and can tolerate daily dosing

Alternative 3: Chloroquine (Aralen)

Chloroquine phosphate has been used for malaria prophylaxis for decades. However, it is only effective in areas where the malaria parasite remains sensitive to chloroquine. Widespread resistance has developed in most of sub-Saharan Africa, Southeast Asia, and much of South America.

Dosing: 300 mg base (500 mg salt) weekly, starting 1-2 weeks before travel and for 4 weeks after

Advantage: Weekly dosing; widely available; safe in pregnancy and all ages; inexpensive

Disadvantage: Only works where malaria is chloroquine-sensitive (the Caribbean, some parts of Central America)

Best for: Travel to the Caribbean, Mexico (some areas), Central America west of the Panama Canal

Alternative 4: Tafenoquine (Arakoda)

Tafenoquine is a newer once-weekly antimalarial approved for adults (18+) for malaria prophylaxis. It requires G6PD (glucose-6-phosphate dehydrogenase) testing before use, as it can cause serious hemolytic anemia in people with G6PD deficiency.

Dosing: Loading dose (200 mg daily for 3 days before travel), then 200 mg weekly, and a single 200 mg dose 1 week after returning

Advantage: Short post-travel period; weekly dosing; active against liver-stage parasites

Disadvantage: Adults only; requires G6PD testing; not recommended in pregnancy or breastfeeding; more expensive and less widely stocked

How to Choose the Right Alternative

When selecting a mefloquine alternative, your travel medicine provider or prescriber will weigh:

Destination: Is your travel area chloroquine-sensitive or resistant? Does the destination have mefloquine-resistant strains (Southeast Asia)?

Trip length: Short trips favor atovaquone-proguanil (only 7 days after return); long trips may favor weekly dosing

Personal health: Pregnancy, psychiatric history, G6PD status, antibiotic tolerability

Cost: Doxycycline is cheapest; Malarone is most expensive but often better tolerated

See also: Why Is Mefloquine Hard to Find in 2026? for context on the current shortage.

The Bottom Line

If mefloquine is unavailable at your pharmacy, atovaquone-proguanil is typically the closest comparable alternative for most destinations. Doxycycline is the most affordable option. Always make this decision with your prescriber, who can evaluate your destination's resistance profile and your personal health history. And if you'd like to keep searching for mefloquine itself, medfinder can check pharmacies near you on your behalf.