Jethimadh  or Mulethi can be used in multiple ways to help with sour and Itchy throat. It can be boiled to prepare a decoction or its Tea with Honey. The Mulethi can be kept in the mouth and licked to relieve Itchy throat or dry cough.
Mulethi is a very useful herb and is widely used in Indian and Chinese Medicine for cough, congested chest.