For a patient with a history of cardiac issues presenting with chest pain, what should you ask regarding his medication?

Inquiring whether the patient has taken Viagra within the last 24 hours is crucial due to the interaction between Viagra and certain cardiac medications, particularly those containing nitrates. Nitrates are often prescribed to patients with cardiac issues to relieve chest pain or manage angina. The combination of Viagra, which is a phosphodiesterase inhibitor used for erectile dysfunction, and nitrates can lead to a significant drop in blood pressure, resulting in potentially life-threatening complications.

This question emphasizes the importance of understanding medication interactions and their effects on a patient's condition. Collecting this information is vital for the EMT to prepare an appropriate treatment plan and ensure the safety of the patient.