I was at a music thing last night and learned something new. Several musicians now use and swear by ginseng liquid. I don't know whether it is considered useful against laryngitis but they believe that it definitely helps maintain the ability to sing when the voice had been almost gone.

One method they talked about is gargling the contents of the one bottle and then drinking the other. (These are tiny bottles measured in grams.)

In Fairbanks Alaska, they buy them by the case of 30 bottles for $8.00 from China via 'Prince of Peace, Ent.'

FWIW