 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST]  by keeping water in the intestines, which causes movement of the intestines. How to use Senna Lax Take this medication by mouth as directed by your doctor. If you are self-treating, follow all directions on the product package. If you have any questions, ask your doctor or pharmacist. If you are using the chewable tablets, chew each tablet well and swallow. If you are using the dissolving strips, allow each strip to dissolve on the tongue and then swallow, with or without water. If you are using the liquid form of this medication, measure the dose carefully using a special measuring device/cup. Do not use a household spoon because you may not get the correct dose. Dosage is based on your age, medical condition, and response to treatment. Do not increase your dose or take this drug more often than directed. Do not take this medication for more than 7 days unless directed by your doctor. Serious side effects may occur with overuse of this medication (see also Side Effects section). It may take 6 to 12 hours before this medication causes a bowel movement. Tell your doctor if your condition lasts or gets worse, or if bleeding from the rectum occurs. If you think you may have a serious medical problem, get medical help </s>