Compare to ex-lax Maximum Strength active ingredient (This product is not manufactured or distributed by GlaxoSmithKline plc, distirbutor of ex-lax). Sennosides USP, 25 mg (stimulant laxative). Gentle, dependable overnight relief. 100% Quality Guaranteed: Like it or let us make it right. That's our quality promise. supervaluprivatebrands.com. Questions toll free 1-877-932-7948. Other information: Each tablet contains: calcium 40 mg. Very low sodium. Store between 68 - 77 degrees F (20 - 25 degrees C).