What is the primary purpose of antiemetics like dimenhydrinate (Dramamine) and meclizine (Antivert)?

Antiemetics like dimenhydrinate and meclizine are primarily used to suppress nausea and vomiting. These medications work by targeting the signals in the brain that trigger the vomiting reflex, making them effective for treating motion sickness, vertigo, and other conditions that induce nausea. By providing relief from these symptoms, they enhance the patient's comfort and ability to function.

The other options refer to different gastrointestinal concerns. For example, controlling diarrhea involves medications that specifically target intestinal motility and fluid absorption, while correcting constipation requires agents that stimulate bowel movements or soften stools. Neutralizing stomach acid relates to antacids, which are used to relieve heartburn and indigestion but do not address nausea or vomiting. Each of these options serves a distinct purpose, but the primary function of antiemetics like dimenhydrinate and meclizine remains focused on alleviating nausea and vomiting.