...hmmm...well...if we are talking intractable CH then ya might hafta go there...but there are newer BETTER options like busting, D3....and as Bejeeber notes, ketamine....which is incredibly promising! all assuming that proper oxygen use with energy drinks is not an effective breakthrough of these measures abortive...please do read
....you would be wise to proceed cautiously with lithium. in my CH "career" of over 20 meds tried...it is the only one offered i refused outright. some few have indeed found effective, and perhaps infusion beats the old pill form. but, it is a med with scary potential and dialing in the right dose difficult and critical (too little and no effect, just a bit too much, and YIKES!). this dance requires extended/extensive blood work and monitoring which is intrusive on "normal" life ...