ClearLax Side Effects
Generic Name: polyethylene glycol 3350
Note: This page contains information about the side effects of polyethylene glycol 3350. Some of the dosage forms included on this document may not apply to the brand name ClearLax.
Not all side effects for ClearLax may be reported. You should always consult a doctor or healthcare professional for medical advice. Side effects can be reported to the FDA here.
For the Consumer
Applies to polyethylene glycol 3350: powder packets for oral solution, powder for oral solution
Check with your doctor if any of these most COMMON side effects persist or become bothersome:
Seek medical attention right away if any of these SEVERE side effects occur while taking polyethylene glycol 3350 (the active ingredient contained in ClearLax)
Cramps; gas; more frequent bowel movements; nausea; stomach pain or bloating.
Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); bleeding from the rectum or rectal pain; diarrhea; severe or persistent nausea, bloating, cramping, or stomach pain.
For Healthcare Professionals
Applies to polyethylene glycol 3350: oral powder for reconstitution
Gastrointestinal side effects have included nausea, abdominal bloating, cramping, diarrhea and flatulence.[Ref]
Diarrhea and excessive stool frequency has been reported following high doses. This occurrence has been particularly prevalent in elderly nursing home patients.[Ref]
1. "Product Information. MiraLax (polyethylene glycol 3350)." Braintree Laboratories, Braintree, MA.
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