What Is Humatin? Uses, Dosage, and What You Need to Know in 2026

Humatin is a prescription antibiotic with a specific and important role in treating gut parasites and liver complications. If you or a family member has been prescribed it, you're probably looking for clear, reliable information about what it does, how to take it, and what to expect. This article provides a comprehensive overview of Humatin based on FDA-approved prescribing information.

What Is Humatin?

Humatin is the brand name for paromomycin sulfate, an aminoglycoside antibiotic produced by the bacterium Streptomyces rimosus var. paromomycinus. It is manufactured by Waylis Therapeutics LLC and comes as oral capsules containing 250 mg of paromomycin. Paromomycin belongs to the same family of antibiotics as neomycin, streptomycin, and kanamycin — but it has a unique property: it is barely absorbed from the gastrointestinal tract, with nearly 100% of an oral dose passing through and being excreted unchanged in the stool.

This poor absorption is actually what makes Humatin valuable for intestinal infections — the drug stays concentrated in the gut where the parasites are, rather than being distributed through the body. It acts as a "luminal amebicide" — a drug that kills parasites living in the intestinal cavity.

What Is Humatin Used For?

The FDA has approved Humatin for two conditions:

1. Intestinal amebiasis (acute and chronic): An infection of the intestines caused by the parasite Entamoeba histolytica. This parasite is usually acquired through contaminated water or food, most commonly in developing countries. Symptoms may include diarrhea, abdominal pain, and in severe cases, bloody stools (dysentery). Note: Humatin is NOT effective for extraintestinal amebiasis (when the infection has spread outside the gut, such as to the liver).
2. Adjunctive therapy for hepatic coma: In patients with severe liver disease, the liver loses its ability to detoxify ammonia produced by gut bacteria. When ammonia levels in the blood rise too high, it can cause confusion, personality changes, reduced consciousness, and even coma (hepatic encephalopathy). Humatin reduces the bacteria in the gut that make ammonia, lowering ammonia levels and helping to manage this complication. It is used as an adjunct — meaning alongside, not instead of, other treatments like lactulose.

Doctors also prescribe Humatin off-label for giardiasis (especially during pregnancy), Dientamoeba fragilis infection, cryptosporidiosis in immunocompromised patients, and occasionally for tapeworm infections.

Humatin Dosage: How Much and for How Long?

Your doctor will prescribe the dose that is right for you based on your body weight, condition, and other factors. Here are the FDA-approved dosing guidelines:

• Intestinal amebiasis: 25 to 35 mg/kg of body weight per day, divided into three doses, taken with meals — for 5 to 10 days. For example, a 70 kg (154 lb) adult would take approximately 1,750 to 2,450 mg per day, divided into three doses of roughly 600-800 mg each.
• Hepatic coma (adults only): 4 grams per day in divided doses, given at regular intervals for 5 to 6 days.

Always take Humatin with food. This significantly reduces GI side effects like nausea and stomach cramps, which are more common at higher doses.

Who Should Not Take Humatin?

Humatin is contraindicated (should not be used) in:

• People with a history of allergy or hypersensitivity to paromomycin or related aminoglycosides
• People with intestinal obstruction (blockage of the bowel)

Use with extra caution in people with intestinal ulcers or bowel lesions (increased absorption risk), and in people with kidney disease (accumulation risk).

Can Children Take Humatin?

Yes. The FDA-approved dosing for intestinal amebiasis applies to both adults and pediatric patients — children take the same weight-based dose of 25 to 35 mg/kg/day divided into three doses with meals for 5 to 10 days. Your child's doctor will calculate the appropriate dose based on weight.

Important Things to Know Before Taking Humatin

• Complete the full course — don't stop early even if you feel better. Stopping early can cause the infection to return and may make bacteria more resistant.
• Humatin only treats bacterial and parasitic infections — it won't work for viral infections like the flu or COVID-19.
• Humatin is not effective for extraintestinal amebiasis (e.g., amebic liver abscess) — a systemic agent like metronidazole is needed for that.
• Tell your doctor about all medications, supplements, and vitamins you take — especially loop diuretics, blood thinners, or immunosuppressants.
• Store at room temperature (68°F to 77°F) away from moisture and heat. Keep tightly closed.

Finding and Paying for Humatin

Humatin is not carried by most retail pharmacies and its brand-name cost can reach thousands of dollars without insurance. See our guides on how to find Humatin near you and

how to save money on Humatin for detailed guidance on patient assistance programs, insurance, and discount options.