Alternatives to Spinosad If You Can't Fill Your Prescription

You've been prescribed Spinosad (Natroba) for head lice or scabies, but you can't find it at your pharmacy — or the price tag is too steep. What now? The good news is that several effective alternatives exist, and your doctor can help you choose the right one for your situation.

In this guide, we'll explain what Spinosad is, how it works, and walk through the best alternative treatments available in 2026.

What Is Spinosad?

Spinosad is an FDA-approved topical prescription medication sold under the brand name Natroba. It's approved for treating head lice in patients 6 months and older and scabies in patients 4 years and older. Manufactured by ParaPRO, LLC, it's available as a topical suspension (0.9%) in 120 mL bottles.

What makes Spinosad stand out is its convenience: for head lice, a single 10-minute application is often all it takes — no nit combing required. For scabies, one full-body application left on for at least 6 hours can achieve what the FDA calls a "complete cure."

For a comprehensive overview, see our guide on what Spinosad is and how to use it.

How Does Spinosad Work?

Spinosad is derived from a naturally occurring soil bacterium called Saccharopolyspora spinosa. It contains two active compounds — spinosyn A and spinosyn D — that target the nervous systems of lice and mites. Specifically, Spinosad activates nicotinic acetylcholine receptors in parasites, causing involuntary muscle contractions, hyperexcitation, paralysis, and death.

Because it works through a unique mechanism of action, Spinosad can be effective against lice that have developed resistance to older treatments like Permethrin. Read more about Spinosad's mechanism of action.

Why You Might Need an Alternative

There are several common reasons patients look for alternatives to Spinosad:

• Availability: Many pharmacies don't stock Spinosad routinely, and it can take days to order
• Cost: Without insurance, Spinosad costs between $250 and $400 per bottle. Even with a coupon, generic Spinosad starts around $121
• Insurance barriers: Many plans require prior authorization or step therapy before covering Spinosad
• Allergies: Some patients may be sensitive to Spinosad or the benzyl alcohol it contains

If you're still trying to find Spinosad, check out our tips on how to find Spinosad in stock near you before switching to an alternative.

Alternative 1: Permethrin (Nix, Elimite)

Permethrin is the most widely used and widely available treatment for both head lice and scabies. It's considered first-line therapy by the CDC and the American Academy of Family Physicians.

• For head lice: Permethrin 1% lotion (Nix) is available over the counter for about $10 to $20. Apply to damp hair, leave on for 10 minutes, then rinse. A second application is recommended 7 to 10 days later.
• For scabies: Permethrin 5% cream (Elimite) is available by prescription. Apply from the neck down, leave on for 8 to 14 hours (typically overnight), then wash off. Cost is generally $20 to $60 with a coupon.

Pros: Inexpensive, widely available, well-studied safety profile
Cons: Increasing lice resistance in many areas of the U.S.; requires nit combing for lice; multiple applications often needed

Alternative 2: Ivermectin (Sklice, Stromectol)

Ivermectin is available in both topical and oral forms and is effective against head lice and scabies.

• Sklice (Ivermectin 0.5% lotion): FDA-approved for head lice in patients 6 months and older. Applied to dry hair, left on for 10 minutes, and rinsed. Like Spinosad, no nit combing is required. Costs around $200 to $350 without insurance.
• Stromectol (oral Ivermectin): Prescription oral medication used for scabies and resistant head lice. Taken as a single dose, often repeated after 7 to 14 days. Generic tablets cost $10 to $30 with a coupon.

Pros: Oral Ivermectin is inexpensive and easy to take; Sklice is convenient for lice
Cons: Sklice is expensive; oral Ivermectin is not FDA-approved for lice (off-label use); may not be appropriate for young children or pregnant women

Alternative 3: Malathion (Ovide)

Malathion 0.5% lotion (Ovide) is an FDA-approved prescription treatment for head lice. It works by a different mechanism than both Permethrin and Spinosad.

• Applied to dry hair, left on for 8 to 12 hours (or until dry), then rinsed
• Effective against lice that are resistant to Permethrin
• Cost is approximately $100 to $250 without insurance

Pros: Effective against resistant lice; kills both lice and nits
Cons: Flammable (avoid heat sources while on hair); strong odor; long application time; not commonly used for scabies

Alternative 4: Benzyl Alcohol Lotion (Ulesfia)

Benzyl alcohol 5% lotion (Ulesfia) is an FDA-approved prescription treatment for head lice in patients 6 months and older. It works by suffocating lice rather than using a neurotoxic mechanism.

• Applied to dry hair, left on for 10 minutes, then rinsed
• Two treatments needed, 7 days apart
• Cost is approximately $150 to $300 without insurance

Pros: Non-neurotoxic mechanism; good option for patients who prefer to avoid insecticide-based treatments
Cons: Does not kill nits (eggs), so repeat treatment is required; not used for scabies; can cause skin irritation

Quick Comparison Table

Here's a summary of how these alternatives compare to Spinosad:

• Spinosad (Natroba): Prescription; lice + scabies; 10-minute application; $121-$400
• Permethrin (Nix/Elimite): OTC (1%) or Rx (5%); lice + scabies; 10 min to overnight; $10-$60
• Ivermectin (Sklice/Stromectol): Rx; lice + scabies; 10 min topical or oral dose; $10-$350
• Malathion (Ovide): Rx; lice only; 8-12 hours; $100-$250
• Benzyl Alcohol (Ulesfia): Rx; lice only; 10 minutes; $150-$300

How to Decide Which Alternative Is Right for You

The best alternative depends on several factors:

• What you're treating: If you have scabies, Permethrin cream or oral Ivermectin are your main alternatives. Malathion and Benzyl Alcohol are for lice only.
• Whether Permethrin has failed: If you've already tried Permethrin without success, Ivermectin or Malathion may be better choices.
• Your budget: Permethrin and oral Ivermectin are the most affordable options.
• Your age: Some treatments have age restrictions. Always check with your doctor.

Talk to your prescribing doctor about which alternative makes sense for your specific situation. You can also read about Spinosad drug interactions to understand why your doctor may have chosen one treatment over another.

Final Thoughts

Spinosad is an excellent treatment for head lice and scabies, but it's not the only option. If you can't find it or can't afford it, treatments like Permethrin, Ivermectin, Malathion, and Benzyl Alcohol lotion can provide effective relief.

Before switching treatments, always consult your doctor. And if you're still trying to track down Spinosad, use Medfinder to check pharmacy availability in your area. You might also be able to bring the cost down — read our guide on saving money on Spinosad.