Ask your doctor. Everybody is different. I quit a 3PAD habit after smoking 37 years, and didn't cough up a thing. Not one little bit, and it has been 7 month since I have smoked a cigarette. I did stop coughing though!
Good call.
Me - 25 roll-ups a day for 30+ years, seven months vaping, haven't coughed up a thing - but have stopped coughing.