1.Palm candy crystals can be substituted with Palm sugar(Pananjarkarai) or Palm Jaggery(Karupatti). Do not add any other sweetener as any other form of sugar will increase the mucus secretion.
2.Once prepared, drink it fresh. Avoid storing and reheating. If you want to drink twice a day, just save some leaves to make next batch.
3.When you have cold/cough, drink this concoction daily(once or twice) for 3 to 5 days.
4.This can be given to 2+ years kids. Reduce the amount of leaves and pepper, when making for kids.
5.If you just have Oregano, then try Oregano tonic. If you just have betel leaf, then try Betel tonic. If you just have Tulsi leaves, then try Tulsi water. All these recipes are available in this website. If you have all 3 leaves, this is a very effective concoction for cold and cough.