Ivermectin Prescription: What You Need to Know

If you’ve seen ivermectin mentioned in news or class, you probably wonder why doctors write it on a script. It’s an antiparasitic drug that fights worms, mites and some other tiny critters. In the right cases it can be a lifesaver, but it works only when used correctly.

When Doctors Prescribe Ivermectin

In most places ivermectin is approved for a handful of infections. The classic one is onchocerciasis, also called river blindness, common in parts of Africa and Latin America. It’s also used for strongyloidiasis (a gut worm) and scabies infestations that don’t respond to creams.

Some doctors may give it off‑label for other parasites, like certain lice or tick‑borne diseases, but that depends on local guidelines. In the U.S., the FDA has only cleared it for the approved uses, so insurance may not cover off‑label prescriptions.

Always ask your prescriber why they chose ivermectin. Knowing the exact infection helps you follow the dosage schedule and spot any red flags.

How to Use Ivermectin Safely

Dosage is usually based on body weight, measured in milligrams per kilogram. A common regimen is 200 µg/kg taken as a single dose, but some infections need a repeat dose after a week. Your pharmacy will calculate the right amount, so double‑check the label before you swallow.

Take the tablet with a full glass of water on an empty stomach, unless your doctor says otherwise. Food can slow absorption and affect how well the drug works.

Side effects are generally mild: headache, dizziness, nausea or a rash. Severe reactions like low blood pressure or allergic shock are rare but require immediate medical help. If you feel faint or have trouble breathing, call emergency services.

Don’t mix ivermectin with other medications without checking first. Some anti‑seizure drugs and certain antibiotics can change how ivermectin is processed in your liver.

If you miss a dose, take it as soon as you remember unless it’s almost time for the next one. Never double up just to make up for a missed pill.

Store the tablets in a cool, dry place, away from direct sunlight. Keep them out of reach of kids – even a small amount can be harmful to a child.

When the course is finished, you’ll likely notice the symptoms improving within a few days. If they persist or get worse, contact your doctor. Sometimes a second round is needed, or a different medication might be better.

Finally, remember that ivermectin is prescription‑only for a reason. Skip the urge to buy it online without a script; unregulated sources may sell counterfeit pills that won’t work and could be unsafe.