Stromectol vs Generic Ivermectin: Is There Any Difference?

If you've priced ivermectin, you've probably seen two names: Stromectol and plain "ivermectin tablets USP." People reasonably wonder whether the cheaper one is a lesser product. In the US, it isn't, and here's why.

Same medicine, different label

Stromectol is Merck's brand of ivermectin. FDA-approved generic ivermectin 3mg tablets from other manufacturers contain the same active ingredient at the same strength.

For a generic to be sold in the US, the FDA requires it to show that it delivers the same amount of active ingredient into the bloodstream over the same time as the brand. That's called bioequivalence. It's the same standard every US generic meets, from blood pressure pills to antibiotics.

What can differ

Inactive ingredients. Binders, fillers and coatings can vary. They don't change how the medicine works, but they matter if you have a specific allergy or intolerance, so tell the pharmacist about any.

Look. Size, shape, color and imprint differ by maker, so don't be thrown if a refill looks different.

Packaging. Pack sizes and blister formats vary.

Price. This is usually the biggest difference. Brand-name drugs often cost more because the brand carries the original development and marketing costs. Our ivermectin price guide covers what ivermectin tends to cost.

What doesn't differ

• the active ingredient (ivermectin)
• the strength (3mg per tablet)
• the approved uses on the label: intestinal strongyloidiasis and onchocerciasis
• the side effects, warnings and interactions (see our side effects guide)
• the need for a pharmacist or prescriber to set the dose

Why there are no 6mg or 12mg Stromectol tablets in the US

Both Stromectol and the US generics come only as 3mg tablets. Because ivermectin is dosed by body weight, a larger adult can end up taking several tablets at once. Higher-strength tablets exist in other markets. The Iverheal tablets we sell, made in India by Healing Pharma, come in 3mg, 6mg, 12mg and 24mg. They are not FDA-approved, and every order needs a valid prescription. Our strength comparison goes into the differences.

Ivermectin made for other markets

You'll find ivermectin sold online under brand names made for other countries. Iverheal, which we sell, is one of them: it's made in India by Healing Pharma and has not been reviewed or approved by the FDA. It isn't a US generic of Stromectol, and we don't describe it as one. That's why every order with us needs a valid prescription and a pharmacist's review. The FDA's consumer pages on fda.gov explain its rules on buying medicine online and how to spot unsafe online pharmacies.

Animal products are a different thing entirely

Ivermectin pastes and drenches for horses and cattle are not generics of Stromectol. They're made at concentrations for animals weighing hundreds of pounds and may contain ingredients not tested in people. This guide explains the FDA's warnings.

So which should you choose?

Between the brand and a US generic, the generic is usually the sensible choice: same medicine, same standard, lower price. Choose the brand if your prescriber specifies it or you've had a problem with a generic's inactive ingredients. If your prescriber is open to a non-FDA-approved product such as Iverheal, that's a conversation to have with them first.

How the FDA checks generics

Before a generic can be sold, its maker files an Abbreviated New Drug Application. It must show the same active ingredient, strength, dosage form and route as the brand, and studies have to show it reaches the bloodstream in an equivalent way. Generic factories are inspected to the same manufacturing standards as brand-name ones. Once approved, the FDA lists the generic as therapeutically equivalent, which is why pharmacists can usually substitute one for the other unless a prescriber writes "brand medically necessary."

Can you switch between brand and generic?

Generally yes. Many people move between Stromectol and a generic, or between generics from different makers, without noticing any difference. If you've had a reaction you think was due to an inactive ingredient, note it on your questionnaire so the pharmacist can check the ingredients list.

Checking you've got the real thing

With any medicine bought online, look for a seller that asks for a prescription, a pharmacist you can contact, clear details of who made the product and where, and packaging with a lot number and expiry date. Be wary of sites that don't ask about your health at all or won't say where a product comes from. Our about page explains how our orders are handled, and our frequently asked questions cover what you'll receive.

Insurance and cost

Insurance plans differ in how they treat ivermectin. Our Iverheal orders are cash-pay. If you have a prescription and want to use insurance for an FDA-approved generic or Stromectol, your regular pharmacy may be a better fit for that order.

When the brand might still make sense

There are a few situations where staying with Stromectol is reasonable. A prescriber may specify the brand for a particular patient. Someone who has taken the brand before without problems may simply prefer to keep things the same. And occasionally supply of one product is easier than another in a given area. None of these mean the generic is weaker; they're practical choices. If you're unsure, ask your prescriber or pharmacist which product suits you.

One practical tip: when your order arrives, check that the name, strength and maker on the label match the product page and your order confirmation. If anything looks different from what you expected, contact us before taking it.

How buying works with us

We sell Iverheal 3, 6, 12 and 24. Every order needs a valid prescription from a licensed US prescriber, in every state, along with a short health questionnaire that a pharmacist reviews. State pharmacist-dispensing laws, explained on our ivermectin OTC page, cover FDA-approved ivermectin from in-state pharmacies and don't apply to Iverheal. How to get ivermectin explains the prescription route. Orders ship tracked by USPS (see shipping), and your card is charged only after approval.