What is the duration of action for extended-release verapamil?

The duration of action for extended-release verapamil is approximately 24 hours. This formulation is designed to maintain a stable plasma concentration over an extended period, allowing for once-daily dosing in the management of conditions such as hypertension and certain types of angina. The extended-release mechanism helps to prevent fluctuations in drug levels, which contributes to its sustained efficacy and improved patient adherence to the medication regimen. This long duration is critical in ensuring that consistent therapeutic effects are achieved throughout the day without the need for multiple doses.