Q: Does the time of day make a difference in how certain blood pressure medications work? For example, would it be better to take a beta blocker in the am or pm; a calcium channel blocker in the am or pm?
A: Medicines that need to be taken once a day should be taken at the same time every day. Taking a medicine in the morning or at night is largely a matter of personal preference. You want to take medicine when it is easiest for you to remember. However, some people have fewer side effects when they take their medicine at bedtime. Also, the effectiveness of some drugs may be less right before the next dose is taken. Because of this, your doctor may recommend you take your medicine in the morning because blood pressure is higher when you are awake and active.