Welcome to Health Care Magic.
You have not mentioned whether your husband had any injury.
Your husband might well be suffering from muscle ischemia
( decreased blood supply to muscle). As myospaz forte , trinerve forte and amitrin did not work for your husband he is likely to be suffering from muscle ischemia.
Using following drugs can help your husband
Eperisone - it has muscle relaxant
as well as vasodilator activity which results in improved blood supply to the muscle.
Anti oxidants preparations containing Vitamin A
, C, E and lycopene
injections would cover the neurological aspect
Please take these medicines after discussing with your doctor
Hope this will work for your husband and recovers soon.