what is the usual dosage for miralax
For the treatment of occasional constipation (irregularity). This product should be used for 7 days or less or as directed by a physician. The usual dose is 17 grams (about 1 heaping tablespoon) of powder per day (or as directed by physician) in 4 to 8 ounces of water.Each bottle of MiraLax (polyethylene glycol 3350 - otc) is supplied with a measuring cap marked to contain 17 grams of laxative powder when filled to the indicated line.One to 3 days (24 to 72 hours) may be required to produce a bowel movement.ach bottle of MiraLax (polyethylene glycol 3350 - otc) is supplied with a measuring cap marked to contain 17 grams of laxative powder when filled to the indicated line. One to 3 days (24 to 72 hours) may be required to produce a bowel movement.