There is no remedy besides quitting - tobacco smoking is harmful for your health, and if such a magical substitute for quitting existed, people would not suffer any ill effects of smoking and the question of quitting would never arise. Smoking affects almost every single aspect of your health - your respiratory system and your voice are of course affected as you already know, and in addition, smoking causes or contributes to several types of cancer, impotence, cataracts, cardiovascular disease, hypertension, gum disease, miscarriages, and birth defects...