Natural Soothing Remedy for Cough

Hi folks! Here's one of the thing I boil twice during my "coughing" period:
Boil 2 bundle of lemon grass(cost only 30 cents per bundle) & 2 pcs of dried tangerine '桔�' (I got it at chinese medical hall,2pcs for MYR3) for 30min in approximately 3 bowls of water). That makes about 3 cups after boiling. Yummy, tasty and soothing. Cheers!