My Husband Had A Heart Attack, Was Given Prescriptions Upon

my husband had a heart attack, was given prescriptions upon release, pharmacy said the one pill he shouldn't have, did not fill. because he had a severe reaction to coversyl. Recommended going to the dr. he did. Did not get a replacement for the coversyl. They said he needs atenol now. The dr took him off that 6 weeks ago, said you shouldn't have it that long. He is almost 65 years old. How can we get the right bp medication now, we are in Saskatoon?