Talk to General Physician on Mucus Problem Due To Cigarette

I am a smoker due to which I have mucus problem, I am trying to quit smoking slowly, I was smoking 20 cigarettes a day but now I have reduced the cigarettes to 10 per day. Any expert that can prescribe a syrup that can deal well with mucus? Any syrup with no side effects. Not looking for antibiotics. Help will be appreciated with dua. JazakAllah