Best Senna Laxatives of 2026

The first thing we noticed about Major's senna tablets is how small they are for a bottle this size. That is a real advantage if swallowing pills is the part you dread: the 8.6 mg tablets go down easily with water, and the 1,000-count bottle means you are not rationing them.

This is our bulk pick because it turns a recurring purchase into a once-in-a-long-while one. The label dose is two tablets at bedtime, with a maximum of four tablets twice a day, so the bottle lasts through plenty of occasional use. We kept it in a cupboard rather than on the nightstand; it is not a discreet little bottle.

The formula is the same straightforward senna story as the brand-name tablets: 8.6 mg of sennosides per tablet, no stool softener, and a six-to-twelve-hour window. The missing softener is worth knowing if hard, dry stools are your main problem; this is not the dual-action answer. For simple irregularity, the small size and familiar dose are what make it easy to live with.

What settled it for us is the arithmetic of a household staple: small tablets, a familiar dose, and a supply long enough that you stop thinking about running out. The bottle is not pretty or discreet, but it earns its cupboard space.

GeriCare Senna Plus is the dual-action formula we recommend first for hard, dry stools. It pairs 8.6 mg of sennosides with 50 mg of docusate sodium, the same two actives as the brand-name version, in a 200-count bottle.

The size is the point. A 200-count bottle covers occasional use without committing you to a thousand tablets, and it costs less per tablet than the small brand-name dual-action bottle. We like that balance for a medicine cabinet: enough to get through a rough patch, not so much that you feel stuck with it.

The tablets are easy to swallow, and the label sets the usual six-to-twelve-hour window. We treated it as a bedtime product and kept the morning clear the first time, which is sensible with any stimulant laxative plus softener. The docusate is there for texture, not speed.

For the specific job of softening and moving, this is the most sensible bottle in the group. We keep it for the weeks when a softener is clearly part of the answer, not as an everyday habit.

Prunelax Maximum Relief is the one we treat as a step up, not a starter. Each serving carries 250 mg of senna leaf extract, and the label puts relief at eight to twelve hours, so the timing still fits a bedtime dose.

We rank it among the stronger options in this group, and that is exactly why we are careful with it. The 100-count bottle is generous, the tablets are easy to take, and the vegan, gluten-free formula is a plus for people who read labels closely. But this is not the bottle we hand to someone trying senna for the first time.

The 100-count bottle and the eight-to-twelve-hour window make it practical for occasional stubborn constipation. We do not start here if you are new to senna; the extra-strength label is doing real work. Keep it for the times a standard tablet has not been enough, and follow the label rather than stacking a second dose early.

What we like most is that it gives you a clear step up without turning into a multi-ingredient formula. If you already know senna works for you and want a stronger single-herb option, this is the bottle we keep for those days.

Swiss Kriss is not a purified senna extract. The tablets use finely ground senna leaf blended with strawberry leaf, anise, caraway, hibiscus, calendula, and peach leaf, which makes it the most old-fashioned formula in this group.

That blend is the appeal and the catch. We like it for someone who wants a whole-leaf herbal tablet rather than a standardized extract, and the 250-count bottle is a good size for occasional use. The label puts relief at six to twelve hours and sets the product apart from the single-ingredient tablets here.

We were impressed by how gentle the overall formula seems in use, but we do not treat the extra herbs as proof of a better result. The senna is still a stimulant laxative, and the blend makes the dose harder to compare with a plain 8.6 mg tablet. If you want to know exactly how much senna you are taking, choose a single-ingredient product instead.

Where Swiss Kriss earns its place is for the person who has used it before and likes the herbal format. It is not the bottle we recommend for a first trial. But for an occasional, familiar routine, the ground-leaf approach is different enough to be worth a place here.

The 600-count GenCare bottle sits in the useful middle: smaller than the thousand-tablet jugs, but still a long supply for a household that uses senna now and then.

We like the coated tablets. They are small, easy to swallow, and the coating keeps them from feeling chalky on the way down. The dose is the standard 8.6 mg of sennosides, taken at bedtime, with relief expected in six to twelve hours. Nothing about the formula is fancy, and that is the point.

This is our budget single-ingredient pick because it gives you the same active dose as the brand-name regular-strength tablets without the brand-name price. The bottle is also easier to store than the biggest bulk options. We choose it for a second bottle, a guest bathroom, or a household that has already settled on senna.

The caveat is that senna is still senna. If your stomach is sensitive, start with the lower end of the label dose and see how you do. We did not find this one harsher than the other single-ingredient tablets here, and the coating makes repeat doses easier to take.

Senokot-S is the brand-name version of the dual-action idea: 8.6 mg of sennosides plus 50 mg of docusate sodium in one tablet.

We reach for it when someone wants the Senokot name and a stool softener in the same bottle, not when they want the best value. The tablets are easy to swallow, and the label is straightforward. It is a tidy option for a medicine cabinet. Judgement, not packaging, keeps it here: the combination is sensible for hard, dry stools.

The combination makes sense for hard, dry stools, and the bedtime dose is straightforward. But it is not the value pick; the larger generic bottles here use the same two actives and go further. We also do not use it for simple infrequent constipation where a single-ingredient tablet would do.

What keeps it in the guide is the formula, not the packaging. If you have used Senokot before and want the dual-action version without switching brands, this is the one. If you are simply chasing the lowest cost per tablet, GeriCare or Pharbest make more sense.

Pharbest's Senna Plus is the bulk dual-action bottle we keep for a caregiver's cupboard: 1,000 tablets, senna plus a stool softener, and a six-to-twelve-hour window.

The appeal is not subtle. You get both actions in one tablet, a supply that lasts, and a label that tells you to expect relief in the usual overnight window. We like it for a household where more than one person needs the combination, or for someone who has already decided dual action is the right fit.

It is not the bottle we recommend for a first purchase. A thousand tablets is a lot to commit to before you know whether the combination suits you, and the formula is not meaningfully different from the smaller dual-action picks here. Start with a smaller bottle and move to this one once the routine is established.

Where it earns a place is as a refill. The tablets are easy to take, the dose is familiar, and the big bottle cuts down on repeat orders. Just check the label every time; the short-term use limit still applies, even when the bottle looks like it will last for years.