What it's used for
This product is an osmotic laxative used for cleaning the colon as a preparation for colonoscopy in adults.
Source: U.S. FDA-approved prescribing information (openFDA).
Typical dosing
Two doses are required using a two-day or one-day dosing regimen, and the powder must be reconstituted in water prior to ingestion.
Dosing shown here is the general FDA-labeled range. Your prescribing clinician determines the exact dose, form, and schedule for you — this is not a substitute for medical advice.
Common side effects
Important adverse reactions associated with bowel preparations include fluid and electrolyte abnormalities, cardiac arrhythmias, and seizures.
Covered strengths on the Tab $0 list
Covered at $0 with an active Tab membership when filled at a participating pharmacy nationwide or through mail order. A licensed clinician must prescribe the medication.
Related medications
Other everything else medications covered at $0 with an active Tab membership.
Peg cost without insurance
Cash prices for Peg without insurance vary widely by pharmacy, strength and quantity — the same prescription can cost very different amounts at two pharmacies in the same town. That is the problem a membership solves.
Peg is on Tab's covered $0 generic list. With an active Tab membership, every covered strength is $0 — not a percentage off, not a coupon that changes month to month — at participating pharmacies nationwide or through mail order. You do not need insurance, and Tab works whether or not you have a health plan.
Tab is a membership, not insurance. Covered medications require a prescription from a licensed clinician.
Peg dosage and administration
Preparation and Administration: Two doses of PEG-3350, Sodium Sulfate, Sodium Chloride, Potassium Chloride, Sodium Ascorbate, and Ascorbic Acid for Oral Solution are required for a complete preparation for colonoscopy, using a "Two-Day" preferred method or "One-Day" alternative method dosing regimen. ( 2.1 ) PEG-3350, Sodium Sulfate, Sodium Chloride, Potassium Chloride, Sodium Ascorbate, and Ascorbic Acid for Oral Solution must be reconstituted in water prior to ingestion. ( 2.1 ) Additional clear liquids must be consumed after each dose of PEG-3350, Sodium Sulfate, Sodium Chloride, Potassium Chloride, Sodium Ascorbate, and Ascorbic Acid for Oral Solution in both dosing regiments.
Excerpt from the FDA-approved prescribing information (openFDA), retrieved 2026-09-15. Your prescribing clinician decides the exact dose, form and schedule for you — this is not medical advice.
Peg side effects
The following serious or otherwise important adverse reactions for bowel preparations are described elsewhere in the labeling: Serious Fluid and Electrolyte Abnormalities [ see Warnings and Precautions (5.1) ] Cardiac Arrhythmias [ see Warnings and Precautions (5.2) ] Seizures [ see Warnings and Precautions (5.3) ] Patients with Renal Impairment [ see Warnings and Precautions (5.4) ] Colonic Mucosal Ulceration, Ischemic Colitis and Ulcerative Colitis [ see Warnings and Precautions (5.5) ] Patients with Significant Gastrointestinal Disease [ see Warnings and Precautions (5.6) ] Aspiration [ see Warnings and Precautions (5.7) ] Glucose-6-Phosphate Dehydrogenase (G6PD) Deficiency [ see Warnings and Precautions (5.8) ] Hypersensitivity Reactions [ see Warnings and Precautions (5.10) ] Most common adverse reactions (≥ 5%) are: Two-Day (Split-Dose): malaise, nausea, abdominal pain, vomiting, and upper abdominal pain.
Excerpt from the FDA-approved prescribing information (openFDA), retrieved 2026-09-15. This is not a complete list. Report side effects to your clinician, and seek care for anything severe or unexpected.
Peg drug interactions
Drugs that increase risk for fluid and electrolyte imbalance. ( 7.1 ) 7.1 Drugs That May Increase Risks due to Fluid and Electrolyte Abnormalities Use caution when prescribing PEG-3350, Sodium Sulfate, Sodium Chloride, Potassium Chloride, Sodium Ascorbate, and Ascorbic Acid for Oral Solution for patients with conditions and/or who are using medications that increase the risk for fluid and electrolyte disturbances or may increase the risk of renal impairment, seizures, arrhythmias, or QT prolongation in the setting of fluid and electrolyte abnormalities [see Warnings and Precautions ( 5.1 , 5.2 , 5.3 , 5.4 )].
Excerpt from the FDA-approved prescribing information (openFDA), retrieved 2026-09-15. Tell your clinician and pharmacist about every medication, supplement and over-the-counter product you take.
Who should not take peg
PEG-3350, Sodium Sulfate, Sodium Chloride, Potassium Chloride, Sodium Ascorbate, and Ascorbic Acid for Oral Solution is contraindicated in the following conditions: Gastrointestinal (GI) obstruction [ see Warnings and Precautions (5.6) ] Bowel perforation [ see Warnings and Precautions (5.6) ] Gastric retention Ileus Toxic colitis or toxic megacolon Hypersensitivity to any ingredient in PEG-3350, Sodium Sulfate, Sodium Chloride, Potassium Chloride, Sodium Ascorbate, and Ascorbic Acid for Oral Solution [ see Warnings and Precautions (5.10) ] Gastrointestinal (GI) obstruction (4, 5.6 ) Bowel perforation (4, 4.6) Gastric retention (4) Ileus (4) Toxic colitis or toxic megacolon (4) Hypersensitivity to any ingredient in PEG-3350, Sodium Sulfate, Sodium Chloride, Potassium Chloride, Sodium Ascorbate, and Ascorbic Acid for Oral Solution (4, 5.10 )
Excerpt from the FDA-approved prescribing information (openFDA), retrieved 2026-09-15. Whether this medication is appropriate for you is a clinical decision made by your prescribing clinician.
Common questions
Is peg covered at $0 with Tab?
Yes. Peg is on Tab's covered $0 generic list — every covered strength is $0 with an active membership, at participating pharmacies nationwide or by mail order.
Do I need insurance to get peg through Tab?
No. Tab is a membership, not insurance. Covered medications are $0 with an active membership whether or not you have a health plan.
How do I get a peg prescription with Tab?
Book a video visit with a licensed Tab clinician (unlimited visits are included with membership). If it's clinically appropriate, they send the prescription to your chosen participating pharmacy or by mail order.
How much does peg cost without insurance?
Without insurance, retail cash prices for peg vary by pharmacy, strength and quantity. Peg is on Tab's covered $0 generic list, so every covered strength is $0 with an active Tab membership at participating pharmacies nationwide or by mail order.
What is the cheapest way to get peg?
For medications on Tab's covered list, a Tab membership is the cheapest route: covered strengths of peg are $0 with an active membership, and unlimited video visits with a licensed clinician are included, so the visit that produces the prescription is covered too.
What is the usual dose of peg?
Preparation and Administration: Two doses of PEG-3350, Sodium Sulfate, Sodium Chloride, Potassium Chloride, Sodium Ascorbate, and Ascorbic Acid for Oral Solution are required for a complete preparation for colonoscopy, using a "Two-Day" preferred method or "One-Day" alternative method dosing regimen. (FDA-approved label, retrieved 2026-09-15. Your clinician sets your dose.)
What are the side effects of peg?
The following serious or otherwise important adverse reactions for bowel preparations are described elsewhere in the labeling: Serious Fluid and Electrolyte Abnormalities [ see Warnings and Precautions (5.1) ] Cardiac Arrhythmias [ see Warnings and Precautions (5.2) ] Seizures [ see Warnings and Precautions (5.3) ] Patients with Renal Impairment [ see Warnings and Precautions (5.4) ] Colonic Mucosal Ulceration, Ischemic Colitis and Ulcerative Colitis [ see Warnings and Precautions (5.5) ] Patients with Significant Gastrointestinal Disease [ see Warnings and Precautions (5.6) ] Aspiration [ see Warnings and Precautions (5.7) ] Glucose-6-Phosphate Dehydrogenase (G6PD) Deficiency [ see Warnings and Precautions (5.8) ] Hypersensitivity Reactions [ see Warnings and Precautions (5.10) ] Most common adverse reactions (≥ 5%) are: Two-Day (Split-Dose): malaise, nausea, abdominal pain, vomiting, and upper abdominal pain. (FDA-approved label, retrieved 2026-09-15.)
What interacts with peg?
Drugs that increase risk for fluid and electrolyte imbalance. (FDA-approved label, retrieved 2026-09-15. Tell your clinician about every medication and supplement you take.)
Peg is $0 on the covered list
Members pay $0 for covered generics at participating pharmacies nationwide or by mail order — plus unlimited virtual primary care, urgent care and dermatology visits. No insurance needed.
Solo $49/mo · Family $119/mo for up to 4 people · Family+ $149/mo for up to 8
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