Grapes act as an expectorant also. It helps loosen cough and mucus.
Grapes are also rich in Vitamin C which helps strengthen your immune system. Add it regularly to your diet to stay away from cough.
Mix grape juice with some water and honey and drink it to fight cough in a few days.
It is important to make fresh grape juice. Using bottled grape juice with added sugar will have provide you with these health benefits. Instead it will aggravate your condition. So always use freshly squeezed grape juice for this home remedy.