Bisoprolol should be used with care if you are also taking verapamil. Verapamil can depress the heart muscle and slow the electrical signals passing through the heart (A-V conduction), and bisoprolol can do the same, so the two taken together need caution.
These medicines are often taken together with some care. Your doctor may change a dose, space them apart or check on you more often. Make sure your doctor and pharmacist know you take both.