What is the primary function of Dramamine?

Dramamine is primarily known for its ability to suppress nausea and vomiting. It contains the active ingredient dimenhydrinate, which is an antihistamine. By blocking certain signals to the brain that trigger the sensation of nausea, it effectively alleviates symptoms associated with motion sickness and other causes of nausea.

In contrast, the other options represent functions that are not associated with Dramamine. For instance, antacids work primarily to neutralize stomach acid, while Dramamine does not serve this purpose. Additionally, treating infections in the gastrointestinal tract would typically involve antibiotics or other specific antimicrobial agents, which are unrelated to the action of Dramamine. Similarly, regulating pancreas activity pertains to medications affecting local blood sugar control or digestive enzyme secretion, such as insulin or enzyme replacements, which again are not functions of Dramamine.

Therefore, the primary function of Dramamine as it relates to suppressing nausea and vomiting stands out as the correct answer.