Which medication is known to cause diarrhea as a side effect?

Dantrium, also known as dantrolene, is a medication primarily used for the management of muscle spasticity and conditions such as malignant hyperthermia. One notable side effect of Dantrium is gastrointestinal disturbances, which can include diarrhea. This occurs due to the impact the drug has on muscle relaxation and its potential to influence gut motility.

In contrast, Baclofen, Valium (diazepam), and Tizanidine are primarily muscle relaxants but have different side effect profiles. Baclofen often causes sedation or dizziness as common side effects, Valium typically may lead to drowsiness or confusion, and Tizanidine is known for its sedative effects as well. While all medications can have individual side effects, Dantrium’s association with diarrhea is more pronounced and considered a noteworthy adverse effect, making it the correct response in this context.