Can't find Clenpiq? Learn about the best alternative bowel prep medications for your colonoscopy, how they compare, and what to ask your doctor.
You've got a colonoscopy on the calendar, your doctor prescribed Clenpiq, and now your pharmacy says they can't fill it. Whether it's a stocking issue, an insurance problem, or the cost is too high, the good news is that there are several effective alternatives that can get you ready for your procedure.
In this article, we'll explain what Clenpiq is and how it works, then walk you through the best alternative bowel preparations available in 2026. We'll cover how each one compares so you can have an informed conversation with your doctor.
Clenpiq is a prescription bowel preparation made by Ferring Pharmaceuticals. It's used to cleanse the colon before a colonoscopy so that your doctor can get a clear view of the inside of your colon. It was first approved by the FDA in 2012 and is approved for adults and children ages 9 and older.
Clenpiq comes as a ready-to-drink oral solution in two small 5.8-ounce bottles. You drink one bottle the evening before your colonoscopy and the second bottle the morning of the procedure, along with plenty of clear liquids.
For a complete overview, see our guide: What Is Clenpiq? Uses, Dosage, and What You Need to Know.
Clenpiq contains three active ingredients that work together:
This dual-action approach (stimulant plus osmotic) is what makes Clenpiq effective at cleaning the colon with a relatively small volume of liquid. To learn more about how this medication works, check out: How Does Clenpiq Work? Mechanism of Action Explained.
There are several reasons patients look for alternatives to Clenpiq:
All of these alternatives are FDA-approved bowel preparations for colonoscopy. Each requires a prescription from your doctor.
Active ingredients: Sodium Sulfate, Potassium Sulfate, Magnesium Sulfate
How it works: Suprep is an osmotic laxative that draws water into the colon. It comes as two 6-ounce bottles of concentrated liquid. Each dose is diluted with water to 16 ounces before drinking, followed by two additional 16-ounce cups of water.
Pros: Well-established, widely available at most pharmacies. Has been on the market since 2010. Generic versions (sodium sulfate/potassium sulfate/magnesium sulfate) are available, which can significantly reduce cost.
Cons: Larger total drinking volume than Clenpiq. Taste can be challenging for some patients.
Approximate cost: $30–$80 for the generic version; brand Suprep is around $150–$250.
Active ingredients: Polyethylene Glycol 3350, Sodium Ascorbate, Sodium Sulfate, Ascorbic Acid, Sodium Chloride, Potassium Chloride (Dose 1); Polyethylene Glycol 3350, Sodium Ascorbate, Sodium Sulfate, Ascorbic Acid (Dose 2)
How it works: Plenvu is a low-volume PEG-based bowel prep. Dose 1 is mixed with water to make 16 ounces; Dose 2 is mixed with water to make 16 ounces. Additional clear liquids are required after each dose.
Pros: Lower total volume compared to traditional PEG preps. Fruit-flavored. Generally well-tolerated.
Cons: Brand-only with no generic, so cost can be high. Contains ascorbic acid, which may not be suitable for everyone.
Approximate cost: $200–$350 without insurance.
Active ingredients: Polyethylene Glycol 3350, Sodium Sulfate, Sodium Chloride, Potassium Chloride
How it works: Suflave is a newer sulfate-free PEG-based bowel prep. Each dose is mixed with water to make approximately 16 ounces, followed by additional clear liquids.
Pros: Low-volume prep similar to Plenvu. Newer option that may be better tolerated by some patients.
Cons: Brand-only, limited track record compared to older preps. May not be stocked at all pharmacies.
Approximate cost: $200–$300 without insurance.
Active ingredients: Polyethylene Glycol 3350, Sodium Sulfate, Sodium Chloride, Potassium Chloride, Ascorbic Acid, Sodium Ascorbate
How it works: MoviPrep is a PEG-based osmotic laxative. Each dose is mixed with water to make 1 liter, and you drink two doses total. Additional clear liquids are required.
Pros: Well-studied and effective. Available in generic form. Lower volume than the traditional gallon-sized PEG preps like GoLYTELY.
Cons: Still requires drinking more liquid than Clenpiq or other low-volume options.
Approximate cost: $20–$60 for generic versions.
Here's how these alternatives stack up against Clenpiq:
If you need to switch from Clenpiq, here are good questions for your doctor:
Not being able to fill your Clenpiq prescription is frustrating, but it doesn't have to derail your colonoscopy. Suprep, Plenvu, Suflave, and MoviPrep are all proven alternatives that your doctor can prescribe. The key is to act quickly — talk to your doctor, check your insurance coverage, and fill the new prescription with enough time before your procedure.
If you want to try finding Clenpiq first, use Medfinder to check which pharmacies near you have it in stock. And remember — the most important thing is getting your colonoscopy done on time. Early detection of colorectal cancer saves lives.
For more information, read: How to Find Clenpiq in Stock Near You.
You focus on staying healthy. We'll handle the rest.
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