Aldo Tagliatelli is 71 years old and migrated to this country from Italy with his wife 10 years ago.

He is in hospital having treatment for a minor stroke. The stroke has affected his speech and the movement of his right arm and hand (he is right-handed). He is recovering well, and it is expected that he will be discharged home, where his 68-year-old wife, Mary, will care for him. He is taking, and will continue to take, the diuretic bendroflumethiazide and the beta-blocker atenolol for hypertension.

Added to this will be the anticoagulant warfarin. Discuss the factors, both positive and negative, affecting Aldo’s compliance with his drug therapy.