Brief Answer:
Generally true

Detailed Answer:
Hi friend,
Welcome to Health Care Magic

Both the drugs could potentially reduce the heart rate and also depress the muscle.
Therefore, the combination is almost uncommon, but not entirely unknown.

There are several classes of drugs and several drugs in each class – so that the physician has a wider choice, for the treatment of blood pressure.
If there is no arrhythmia or angina, a drug from a different class – usually an ACEI (Angiotensin Converting Enzyme Inhibitor) or ARB (Angiotensin Receptor Blocker) is usually chosen.

Have a second opinion

Take care     
Wishing speedy recovery
God bless
Good luck

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