
Betel leaves have thousands of year old history. Ancient Sanskrit texts mention them. During an engagement ceremony, the parents of the bride and the groom exchange betel leaves and areca nuts. A mouth freshener called paan is made using betel leaves, areca nuts and some lime, which is very popular in India and other South east Asian countries. Betel leaves grown in in Banaras, Mysore and Kerala are very famous.
I use the betel leaves in a tea whenever I have a cough. Eating a small slice of fresh turmeric will also cure the cough.