Which medication is effective in alleviating symptoms of dizziness associated with nausea during a cardiac event?

Gravol, known generically as dimenhydrinate, is effective in alleviating symptoms of dizziness associated with nausea, particularly during a cardiac event. Dizziness and nausea can often occur together, especially when a patient is experiencing cardiac distress. Gravol works as an antihistamine and antiemetic by blocking signals to the vomiting center in the brain, effectively reducing feelings of nausea and motion sickness.

Other medications listed may not specifically target the symptoms of dizziness coupled with nausea. For example, ASA (Aspirin) is primarily used as an antiplatelet agent to reduce the risk of blood clots in cardiac events and does not address nausea or dizziness. Nitroglycerin is used to relieve chest pain by dilating blood vessels and does not have effects on nausea or dizziness directly. Entonox, a combination of nitrous oxide and oxygen, is typically used for pain management and does not specifically alleviate nausea or dizziness. Therefore, Gravol is the appropriate choice for managing those specific symptoms in a patient experiencing a cardiac event.