mrcem2-1573

A 42-year-old woman with a lengthy history of depression arrives at the Emergency Department after intentionally overdosing on the medication she takes for her heart condition. She informs you that she consumed verapamil SR 160 mg tablets approximately 30 minutes ago. However, her spouse discovered her immediately and promptly brought her to the hospital. Currently, she shows no symptoms. Typically, how much time passes before symptoms begin to manifest in cases of this overdose?