It’s safe for a patient to take TWO calcium channel blockers (CCBs) at the same time.
It can be done...but side effects ARE usually a problem. And combo CCBs shouldn’t be necessary, except in exceedingly rare situations...contraindications or intolerance to other drugs.
Using two CCBs may help improve blood pressure or angina.
Both dihydropyridine and nondihydropyridine CCBs cause vasodilation and lower BP...but they have some important differences.