My father went under angioplasty 2 weeks before and now recovering. Before he was on aspirin which didn't suit him and got hyperacidity for which doctor changes it to ticlopidine. Currently, every night he coughs alot when he tries to sleep even after raising pillow he doesn't feel comfortable and coughs alot and unable to sleep from 2 nights. Sometimes the cough is dry and sometimes mucus also comes in his throat. Can anyone suggest what step should I take further so that his recovery becomes comfortable or is it one of the complications of angioplasty which he has to bear with?