Ex-Lax provides dependable relief from occasional constipation. Ex-Lax is a stimulant laxative that is guaranteed to work gently and effectively overnight. Upon consumption, Ex-Lax works fast to produce a bowel movement, generally within 6-12 hours. It’s the stool softener brand you trust and the effective relief you can rely on. Use Ex-Lax stimulant laxatives for no longer than 7 days and for no other purpose than the relief of occasional constipation, unless directed otherwise by a doctor.