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SunMark ClearLax

Generic name: polyethylene glycol 3350 [pol-ee-ETH-il-een-GLYE-kol]
The brand names are: ClearLax, GaviLAX, HealthyLax, MiraLax, Natura-Lax, etc.
Drug class: laxativese

What is SunMark ClearLax?

SunMark ClearLax is a solution for laxation that increases the amount of water that is present in the intestinal tract to increase the frequency of bowel movements. SunMark ClearLax is utilized as a laxative to treat occasional constipation or irregular stool movements. SunMark ClearLax may also be used for reasons not mentioned in this medication guide.

Side effects of SunMark ClearLax

Contact a medical professional immediately. Get medical attention immediately if you notice symptoms that indicate an allergic reaction, like hives, trouble breathing, or swelling of your lips, face, and tongue.

Do not take SunMark ClearLax. Call your doctor right away if you are suffering from:

  • Bloody or severe diarrhea that is bloody or severe;
  • rectal bleeding from the rectal
  • the blood in your stool; or
  • acute and progressively worsening stomach pains that are getting worse.

Common adverse effects of SunMark ClearLax can include:

  • bloating, gas, upset stomach;
  • dizziness; or
  • more sweating.

This isn't an exhaustive list of possible side effects, and other effects may also be present. Contact your physician for advice regarding medical adverse effects. You can report any side effects to the FDA at 1-800-FDA-1088.

Related drugs

MiraLAX, Erythromycin, Lactulose, Colace, Docusate, Bisacodyl, and Senna


It is not recommended to use this medication if you suffer from constipation or a blockage in your intestinal tract. If you suffer from one of these conditions, you may be a victim of dangerous or life-threatening adverse effects resulting from SunMark ClearLax.

Do not take SunMark ClearLax more often than once a day. Consult your physician if you have any issues with constipation or irregularity after taking this medication for seven consecutive days.

Before you start taking this medicine

You shouldn't make use of SunMark ClearLax in the event that you are sensitive to polyethylene glycol or if you suffer from digestive obstruction or blockage. If you have one of these conditions, you may suffer serious or life-threatening negative effects from SunMark ClearLax. Individuals with issues with eating (such as orexia or bulimia) are not advised to take this medication without the guidance of a physician.

To ensure this medication is suitable for you, inform your doctor if:

  • nausea, vomiting, or severe stomach pain;
  • ulcerative colitis;
  • IBS;
  • kidney disease or
  • If you've had sudden changes in your bowel habits that lasted for 2 weeks or more.

FDA pregnancy category C. It isn't known whether SunMark ClearLax can affect a newborn baby. Consult your physician if you are expecting or planning to get pregnant while taking the medication. It is unclear if polyethylene glycol 3350 is absorbed into breast milk or whether it is harmful to the baby who is nursing. Consult your physician if you are breastfeeding your baby.

How to take SunMark ClearLax?

Follow the instructions on the prescription label. Don't use this medication in smaller or larger quantities or for longer than the recommended time. For the powder version of this medication, take your dosage using the cap that is on the bottle. The cap should be marked with dosage marks on the outside of it. Mix the powder in 4–8 ounces of a chilled or hot drink like soda, juice, water, or coffee. Stir the mixture and drink it as soon as you can. Don't save it for future use.

SunMark ClearLax is expected to cause the bowel to move within one to three days after taking the medicine. The medication usually produces loose or watery stools. Don't use SunMark ClearLax more often than once a day. Consult your physician if you are experiencing constipation or diarrhea after using this medicine for seven consecutive days. Place it in a cool, dry place far from heat and moisture.

What happens if I miss a dose?

You should take the dose you missed as quickly as you remember. Avoid any missed doses if you are nearing the time for your next dose. Don't take any extra medication to make up for the missed dose.

What happens if I overdose?

For medical emergencies, seek emergency medical attention or contact the Poison Help line at 1-800-222-1222.

Avoid this

Follow your doctor's advice regarding any limitations on foods, drinks, or any activity.

Interaction with other drugs

Other drugs can be incompatible with polyethylene glycol 3350, such as prescription and non-prescription medications, vitamins, and herbal products. Be sure to inform your health professionals about any medications you take now and any medications that you decide to stop or change your use of.




Prescription only

Pregnancy & Lactation

CSA Schedule*

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