I would think so, but then I am not sure how they work. If he continues to be fatigued I would urge him to see the doctor and discuss that.
No he did miss taking the med's for a week or two but has been on them regularily for over a week. That was my first thought since some have fatigue as the side effects. If he had a small heart attack further damaging the heart would not the ICD go off?
Has he started taking any new meds that might fatigue him? It wouldn't be a bad idea to see the doctor sooner, though. Take care, Ally