If he's talking on the phone for several hours a day, he's
not in that bad a shape. Probably takes the normal issue of pain pills that are given following open heart surgery.
It is painful!! And remember, Clinton loved his cigars.
Doctors will tell you, anyone who smokes (or had smoked
for years before giving it up)has a mucher tougher time
recuping. If you have any kind of congestion in the
lungs (from the tobacco) or even a slight post nasal drip,
you're really in trouble (agony's a better word!) when you
have to cough up phlegm! First hand experience here.
But he didn't inhale.