What are some herbal medicines for my involuntary muscles in my throat?

what are some medicines or herbal medicines for my involuntary muscles in my throat.. i take clonazepam clonotril 2 mg tablet at bed time it is anti epileptic... but its not worth it. after my work i feel it in my throat and i feel nervous because of my involuntary muscles i cannot breath easily. what should i do? or what im going to do? why some people having this illness.. what are some remedies?