"I was just wondering why is clonazepam the choice benzo used in treating this as opposed to diazepam? I know clonazepam is marketed as a anti convulsant but i thought alot of benzodiazepines had this action"
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Maybe this info might help re: Clonazepam and its effectiveness as an anticonvulsant.
Clonazepam (a 1,4-benzodiazepine) and clobazam (a 1,5-benzodiazepine) are available as oral anticonvulsant drugs. Clonazepam is effective in myoclonic and generalised absence seizures but less effective in generalised tonic-clonic seizures.[84] Clobazam is also effective in these forms of seizures, but is usually reserved as adjunctive therapy in refractory epilepsy. It can also be valuable when used intermittently in epilepsy related to menstruation or in patients who have regular clusters of generalised tonic-colonic or partial seizures,[85] and as cover during changes of anticonvulsant medication. Most other benzodiazepines have anticonvulsant actions in varying degrees[84] and are useful in individual cases.
Souce: Taken from:
http://www.benzo.org.uk/asgr.htm#4
It is a very good site covering lots of info on Benzo's.
"I know anticonvulsants are usually the first choice in treating trigeminal but i couldn't tolerate them and besides the amitriptyline is working great."
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What dose of amitriptyline are you on? Using Clonazepam while on amitriptyline would probably boost its CNS depressant action.
Just curious about what anticonvulsants you have tried and the problems you had with them?
I know carbamzepine (tegoral) is often used for trigeminal neuralgia, and it actually structurally related to tricylics, such as amitriptyline. Have you tried that?
Maybe something like Gabapentin (Neurontin) would be better, or the more potent/newer version pregabalin (Lyrica)? These drugs act on GABA and are used in the treatment of neuralgic pain and partial seizures. Please correct me if I'm wrong but its theorized that it works by blocking signal transduction between gelatinosa neurons which are responsible for feeling heat and pain.
As it boosts GABA, and as GABA-A receptors regulate neuronal excitability ie. fear arousal, panic etc its reportedly successful for anxiety as well. And compared with benzo's fewer issues with tolerance.
These are unfortunately more expensive compared amitriptyline, but as anxiety is involved, maybe a better long term option.