Alison, it might be the meds that are causing the weakness, BUT, I think that the surgery itself that is far more likely the REASON for his problems. Surgery is interpreted by the body as an "assault" -- and causes an increase of antibodies -- and antibodies cause an increase in MG symptoms........it takes a little while for the antibodies to "ramp up" -- 24 to 48 hours sounds about right.

So sorry that your hubby has to endure this -- but, so NICE that he has a GREAT gift to play with!!!