Taking deworming medication causes diarrhea.

Generally, taking deworming medication does not cause diarrhea.

Diarrhea after taking deworming drugs may be an adverse reaction caused by the medication itself, or it could result from consuming raw, cold, spicy, or irritating foods during treatment that stimulate the gastrointestinal tract.

After the medication kills the parasites, it also helps break them down within the body. During this process, certain toxins may be released, causing some irritation to the intestinal mucosa. As a result, some individuals may experience diarrhea. The elimination of parasites can also temporarily affect the normal function of the intestinal system, thereby impairing digestion. Therefore, some people may develop symptoms such as nausea and vomiting. These reactions are generally considered normal after taking deworming medication and usually resolve gradually within 2–3 days. However, since most deworming drugs are fat-soluble and poorly absorbed in the small intestine, consuming excessive oily or high-fat foods during treatment may increase drug absorption in the small intestine, potentially leading to adverse effects such as diarrhea and abdominal pain. Therefore, it is generally not recommended to eat overly greasy foods while taking deworming medication.

Patients are advised to strictly follow medical instructions when taking deworming drugs and to develop a reasonable diet and medication plan under a doctor's guidance, avoiding self-administration of fatty foods or other medications during treatment.