Is Verapamil Causing Tiredness And Breathlessness?

my husband has history of gout and high blood presure , his blood presure was high 150 /100 for around months , his has his legs sweeling, yesterday they change his blood pressure pills for verapamil 80 mg , but he fill so tired , and his respiration is slow.

what he can do now , hi has a lot LAB TEST for tomorrow , but do yu think we need to go to emergency room?