Alternatives to Ivermectin If You Can't Fill Your Prescription

When your pharmacy is out of ivermectin and you need treatment now, one of the most productive conversations you can have is with your prescribing provider: "What else could work for me?" The answer depends entirely on why you were prescribed ivermectin in the first place. This guide breaks down the best alternatives by condition — so you're prepared to ask the right questions.

First: Why Your Condition Matters

Ivermectin is used to treat several different conditions, and the best alternative depends on which one applies to you. The FDA has approved ivermectin tablets for strongyloidiasis (intestinal threadworm) and onchocerciasis (river blindness). Topical ivermectin is approved for rosacea and head lice. Off-label, doctors frequently use ivermectin tablets for scabies. Each condition has its own set of alternatives.

Alternatives for Scabies

Scabies is among the most common reasons ivermectin tablets are prescribed off-label. If ivermectin isn't available, your doctor may consider:

• Permethrin 5% cream (Elimite): The first-line FDA-approved topical treatment for scabies. Applied from neck to toe, left on for 8-14 hours, then washed off. Usually requires a repeat treatment in 1-2 weeks. Widely available and effective for most cases of typical scabies.
• Crotamiton (Eurax) cream/lotion: FDA-approved for scabies, applied for two consecutive nights. Less commonly used due to lower efficacy compared to permethrin, but an option when permethrin isn't tolerated.
• Sulfur ointment (6-10%): An older, compounded treatment that is safe for infants and pregnant women when other options aren't appropriate. Less convenient (applied for 3 nights) but effective.

For crusted (Norwegian) scabies — a severe form common in immunocompromised patients — ivermectin is strongly preferred, and your provider should be notified urgently if it's unavailable.

Alternatives for Strongyloidiasis (Intestinal Threadworm)

Ivermectin is the preferred treatment for strongyloidiasis because it achieves cure rates above 90% with a single dose. If it's unavailable, options include:

• Albendazole (Albenza): An oral anthelmintic taken twice daily for 7 days. Less effective than ivermectin for strongyloidiasis (cure rates of 38-95% depending on the study) but a reasonable alternative when ivermectin isn't available. Albendazole works by disrupting parasite microtubule formation rather than chloride channels.
• Thiabendazole: An older anthelmintic that was previously standard for strongyloidiasis. Still occasionally used but largely replaced by ivermectin due to its inferior tolerability.

Alternatives for River Blindness (Onchocerciasis)

Ivermectin has been the cornerstone of onchocerciasis treatment for decades. It's the only drug that effectively controls the disease at a population level by killing microfilariae. If ivermectin tablets are unavailable:

• Doxycycline: An antibiotic that kills the Wolbachia bacteria that Onchocerca parasites depend on. Requires a 6-week course and is not appropriate for children under 8 or pregnant women, but can reduce adult worm fertility and lifespan.
• Moxidectin: A newer drug in the same avermectin class that received FDA approval for onchocerciasis in 2018. May have longer-lasting effects than ivermectin. Discuss with an infectious disease specialist.

Alternatives for Head Lice

Ivermectin lotion (Sklice) is FDA-approved for head lice and available over-the-counter. If it's out of stock, several effective alternatives exist:

• Permethrin 1% lotion (Nix): OTC, applied to hair and scalp for 10 minutes. First-line for most head lice cases. Resistance is growing in some regions.
• Spinosad (Natroba): Prescription topical treatment; single application with no nit-combing required. Effective even against permethrin-resistant lice.
• Benzyl alcohol 5% (Ulesfia): Kills lice by asphyxiation; requires two treatments 7 days apart.

What to Tell Your Doctor

When discussing alternatives with your provider, be specific about why ivermectin isn't available — it helps them recommend the most appropriate substitute rather than defaulting to a less effective option. Mention how long you've been unable to fill the prescription, and whether you've contacted multiple pharmacies.

Before switching medications entirely, it's worth trying the targeted pharmacy search approach in our guide on how to find ivermectin in stock near you.