Ok My Husband Had Open Heart Lasy Yr He Was

ok my husband had open heart lasy yr he was put on carvediol .35 twice a day..he decide to stop taking it only taking 1 aday I don't know how long he stopped but I would say 1 month at least he also decided to take the new turmeric capsules..he had severe cold symptoms this week lots of coughing could this be a side effect? he was told he need a pacer maker heart only working 35%