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

Colestipol is a prescription cholesterol-lowering medication that has been in use since the 1960s. While it may not be as well-known as statins like atorvastatin or rosuvastatin, it plays an important role for patients who can't tolerate statins or need additional LDL reduction. Here's everything patients need to know about Colestipol in 2026.

What Is Colestipol?

Colestipol is a bile acid sequestrant — a class of cholesterol-lowering drugs that work in the digestive tract rather than the bloodstream. Unlike most medications, Colestipol is not absorbed into your body. It stays in your intestines, where it captures bile acids and carries them out of your body in stool. This forces your liver to make more bile acids from cholesterol in your blood, which lowers your LDL ("bad") cholesterol level.

Brand name: Colestid (no longer marketed in U.S.; generic versions from Amneal and Greenstone/Viatris are available). Also known historically as Cholestabyl in some markets.

What Is Colestipol Used For?

FDA-approved indication:

Primary hypercholesterolemia (high LDL cholesterol) — as an adjunct to diet and exercise in patients who don't adequately respond to dietary changes alone

Common off-label uses:

Cholestatic pruritus (itching due to liver disease and bile acid buildup)

Bile acid diarrhea (diarrhea caused by excess bile acids reaching the colon)

Digoxin or digitoxin overdose (to bind the drug in the GI tract and limit absorption or re-absorption)

What Does Colestipol Look Like?

Colestipol comes in two forms:

Tablets (Colestid brand): Light yellow, tasteless, odorless. Each tablet contains 1 gram of colestipol hydrochloride. They are notably large — take them one at a time with plenty of water. Never crush, cut, or chew.

Granules for oral suspension: Available unflavored (tasteless) or orange-flavored (Flavored Colestid). Must be mixed with at least 3 ounces of liquid before drinking. Never take dry — it can irritate the throat or cause blockage.

How Is Colestipol Dosed?

For adults with high cholesterol:

Tablets: Starting dose 2g once or twice daily; increase by 2g every 1–2 months; maximum dose 16g/day

Granules: Starting dose 5g once or twice daily; increase by 5g every 1–2 months; maximum dose 30g/day

Starting at the lowest dose and increasing gradually minimizes GI side effects. Cholesterol reduction begins within 24–48 hours and reaches maximum effect at about 1 month.

How to Take Colestipol Correctly

Timing with other drugs: Take all other oral medications at least 1 hour BEFORE or 4 hours AFTER Colestipol — it can bind other drugs in your GI tract and reduce their absorption

Tablets: Swallow each tablet whole with plenty of water or another liquid. Never crush, chew, or cut.

Granules: Mix with at least 90mL (3 oz) of water, juice, milk, or soft drink. Can also be mixed with cereals, thin soups, or pulpy fruit. Never take the powder dry.

Vitamins: Take fat-soluble vitamins (A, D, E, K) at least 1 hour before or 4 hours after Colestipol to avoid reduced absorption

Who Should Not Take Colestipol?

Colestipol is contraindicated in patients with:

Complete biliary obstruction — Colestipol requires bile acids in the gut to work; with complete obstruction, there is no bile to bind

Phenylketonuria (PKU) — the flavored granule form contains aspartame, which is metabolized to phenylalanine; use unflavored tablets instead

Known hypersensitivity to any ingredient in Colestipol

Concomitant use of mycophenolate — a major drug interaction (Colestipol reduces mycophenolic acid exposure to dangerous levels)

Is Colestipol a Controlled Substance?

No. Colestipol is not scheduled by the DEA and is not a controlled substance. Any licensed prescriber can prescribe it, and it can be prescribed via telehealth without restrictions.

To understand exactly how Colestipol works at a biological level, see How Does Colestipol Work? Mechanism of Action Explained. For a detailed breakdown of side effects, see Colestipol Side Effects: What to Expect and When to Call Your Doctor.