Updated: January 3, 2026
Alternatives to Suflave If You Can't Fill Your Prescription
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Overview
Can't fill your Suflave prescription before your colonoscopy? Here are the best FDA-approved alternatives, compared side by side.
Is Suflave in stock near you?
Based on 64 real pharmacy checks · 1 patients helped
Verified 5h ago
You've been prescribed Suflave for your upcoming colonoscopy, but the pharmacy doesn't have it. The clock is ticking. What are your options?
The good news: several effective, FDA-approved alternatives exist. Your gastroenterologist can switch your prescription quickly — often with just a phone call — and you won't need to reschedule your colonoscopy. In this guide, we compare the best Suflave alternatives so you can have an informed conversation with your doctor.
What Is Suflave and How Does It Work?
Suflave (polyethylene glycol 3350, sodium sulfate, potassium chloride, magnesium sulfate, and sodium chloride) is a low-volume osmotic laxative approved by the FDA in June 2023. It draws water into the colon to produce the watery diarrhea needed to clean out the bowel before a colonoscopy. It comes as a powder mixed with water to produce a lemon-lime flavored drink, taken as a split-dose regimen (one bottle the night before, one bottle the morning of the procedure).
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Alternative #1: SUPREP Bowel Prep Kit
Best for: Patients who want the closest match to Suflave's mechanism.
SUPREP (sodium sulfate, potassium sulfate, magnesium sulfate) is a sulfate-based osmotic laxative that works similarly to Suflave. It was the comparator in Suflave's pivotal clinical trials, where Suflave achieved a 93–94% success rate vs. SUPREP's 89–94%.
- Form: Liquid solution, low volume (2 small bottles + water)
- Taste: Berry flavor, some find it salty and unpleasant
- Cost: $150–$250 brand; generic versions available ($30–$60)
- Availability: Widely available at most pharmacies
Alternative #2: SUTAB (Sodium Sulfate Tablets)
Best for: Patients who struggle with drinking large or foul-tasting liquid solutions.
SUTAB is the only FDA-approved tablet-based colonoscopy prep. It contains sodium sulfate, magnesium sulfate, and potassium chloride. Patients take 24 tablets in 2 doses of 12, with plenty of water — no flavored liquid required.
- Form: Tablets (24 total, 12 per dose) with water
- Taste: No flavor — just pills and water
- Cost: $75–$150 without insurance; typically covered by insurance
- Availability: Generally well-stocked at major pharmacies
Alternative #3: Clenpiq
Best for: Patients who want the absolute lowest liquid volume.
Clenpiq (sodium picosulfate, magnesium oxide, citric acid) is a stimulant + osmotic laxative combination. Each dose is only 5.4 oz — making it one of the smallest-volume preps available. It has a cranberry flavor.
- Form: Liquid, 5.4 oz per dose (plus water)
- Cost: $150–$250 without insurance
- Caution: Not recommended for patients with kidney disease or inflammatory bowel disease
Alternative #4: GoLYTELY / NuLYTELY (Generic PEG)
Best for: Patients prioritizing cost and availability.
GoLYTELY and NuLYTELY are generic, high-volume polyethylene glycol (PEG) preps that have been used for decades. The main drawback is volume — patients must drink 4 liters total. However, they are extremely affordable and available at virtually every pharmacy.
- Form: 4-liter liquid solution (powder mixed with water)
- Cost: $10–$40 generic — most affordable option by far
- Availability: Virtually every pharmacy stocks this
Alternative #5: Plenvu
Plenvu (PEG-3350, sodium ascorbate, sodium sulfate, ascorbic acid) is a low-volume PEG prep similar in composition to Suflave. Total volume is approximately 2 liters, and it's taken as a split dose. It's a reasonable middle ground between Suflave and GoLYTELY.
- Form: ~2 liters liquid, split dose
- Cost: $150–$200 without insurance
50K+Found
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How to Choose the Right Alternative
- Taste is your biggest concern: Clenpiq (cranberry) or SUTAB (no taste at all)
- Cost is your biggest concern: Generic GoLYTELY/NuLYTELY ($10–$40)
- Volume is your biggest concern: Clenpiq (5.4 oz per dose) or SUPREP (small bottles)
- Closest to Suflave: SUPREP or Plenvu (similar PEG + sulfate mechanism)
The Bottom Line
Don't skip your colonoscopy because you can't find Suflave. There are excellent alternatives, and your doctor can switch you quickly. Before giving up on Suflave, try medfinder to check nearby pharmacy availability. And if a switch is needed, any of the alternatives above will get the job done.
Real-time availability
Is Suflave in stock near you?
Verified 5h ago
Based on 64 real pharmacy checks · 1 patients helped
Suflave is in a shortage right now — Medfinder calls pharmacies near you to track down the ones that have it.
As of July 21, 2026, 2:00 PM ET, Suflave is currently experiencing a shortage. Across 64 pharmacy checks Medfinder placed in the last 30 days, Suflave was confirmed in stock 2% of the time.
- Pharmacy checks
- 64
- FDA status
- Not listed
- Updated
- 5h ago
Suflave is not on the FDA's active shortage list. Medfinder's own pharmacy calls put real-time availability at 2% across 64 checks in the last 30 days. Availability varies by metro, with the most pharmacy activity recorded around Chicago, IL. These numbers are recomputed continuously from live pharmacy calls, so this page reflects current conditions rather than a static estimate.
Suflave availability questions
Is Suflave in stock right now?
As of July 21, 2026, 2:00 PM ET, Suflave was confirmed in stock at 2% of 64 pharmacies Medfinder checked in the last 30 days. Availability changes daily, so we re-check in real time when you search.
How does Medfinder help me find Suflave?
Medfinder calls pharmacies in your area to verify whether Suflave and your specific dose are in stock, then sends you the pharmacy name, address, and phone number.
Need Suflave? We'll find the pharmacy that has it.
Sources: FDA Drug Shortages + Medfinder pharmacy data · Methodology · Full Suflave data
Frequently Asked Questions
Both are solid alternatives. SUPREP uses a similar sulfate-based mechanism and is widely available. SUTAB is a tablet prep that eliminates the need to drink a liquid solution. The best choice depends on your personal preferences and any existing medical conditions. Talk to your gastroenterologist.
Yes. If your pharmacy doesn't have Suflave, your doctor can switch your prescription to GoLYTELY (generic PEG), which is available at virtually every pharmacy and costs $10–$40. Call your doctor's office and they can usually process the change the same day.
All FDA-approved colonoscopy preps are clinically effective when taken correctly. Suflave achieved a 93–94% cleansing success rate in trials, comparable to SUPREP. GoLYTELY is also effective but requires drinking a much larger volume (4 liters). Your doctor will recommend the best prep for your specific situation.
No. Switching bowel prep prescriptions can typically be done over the phone with your doctor's office. Explain that Suflave is unavailable at local pharmacies and ask for an alternative. They can call or fax a new prescription to your pharmacy the same day.
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