Taking sublingual B12 may help his energy and prevent nerve damage.  Fish oil may help with inflammation. Hyperthyroidism is a cause of polymyalgia rheumatica and I saw a study that show those with Grave's Disease improve when taking antioxidants. So I would recommend a good antioxidant blend that has vitamin C, E, quercitin and other antioxidants.  To treat angina, hawthorn is a very safe and calming herb for the heart as well as magnesium would be helpful (200 mg/day).  It would be good to know what the MD believes is the underlying cause of the polymyalgia since there is another condition, Giant Cell arteritis that can cause it to occur.  What are his main symptoms. Is it shoulder and neck pain?  If he is put on a steroid he should take a calcium/vitamin D supplement to avoid bone loss.