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OsmoPrep Dosage

Generic name: sodium phosphate, monobasic, monohydrate, sodium phosphate, dibasic anhydrous
Dosage form: tablet

This dosage information does not include all the information needed to use OsmoPrep safely and effectively. See full prescribing information for OsmoPrep.

The information at Drugs.com is not a substitute for medical advice. ALWAYS consult your doctor or pharmacist.

The recommended dose of OsmoPrep Tablets for colon cleansing for adult patients is 32 tablets (48 grams of sodium phosphate) taken orally with a total of 2 quarts of clear liquids in the following manner:

The evening before the colonoscopy:  Take 4 OsmoPrep Tablets with 8 ounces of clear liquids every 15 minutes for a total of 20 tablets. 

On the day of the colonoscopy:  Starting 3-5 hours before the procedure, take 4 OsmoPrep Tablets with 8 ounces of clear liquids every 15 minutes for a total of 12 tablets. 

​Examples of clear liquids are water, flavored water, lemonade (no pulp), ginger ale or apple juice.  Do not drink any liquids colored purple or red.

Patients should be advised of the importance of taking the recommended fluid regimen. It is recommended that patients receiving OsmoPrep be advised to adequately hydrate before, during, and after the use of OsmoPrep.

Patients should not use OsmoPrep for colon cleansing within seven days of previous administration. No additional enema or laxative is required, and patients should be advised NOT to take additional agents, particularly those containing sodium phosphate.

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