Since 2007, MiraLAX has been the #1 Physician Recommended OTC brand of laxative. MiraLAX is a non stimulant osmotic laxative that works with the water in your body to provide gentle constipation relief. MiraLAX provides constipation ease without harsh side effects like cramping, bloating, sudden urgency, and gas. With no added taste or grit, MiraLAX mixes into most beverages, hot or cold. MiraLAX generally produces a bowel movement in 1-3 days. HSA/FSA Eligible. Restrictions apply; contact your insurance provider about plan allowances and requirements. HSA/FSA cards can be accepted in-store but not on Target.com. For Target.com please use a credit card, debit card or gift card to pay for your eligible items and then submit the receipt to your plan based on the current policies for reimbursement.