thalamus is the part of the brain through which all sensory information is relayed. after a stroke involving the thalamus many times the patient develops thalamic pain syndrome which is very poorly responsive to medications. but as you told that it was relieved to some extent by gabapentin and the patient has already tried pregabalin and carbamazepine with no improvement. so in such case trial of a new medicine can be given in a hope to get some betterment. for the spasticity the patient is already on lioresal. if that is not showing any improvement then injection botox (botulinium toxin) in the stiff muscles of the left hand can be tried. but it is a costly injection and is needed to be repeated every 4 to 6 months. i suggest trying tablet duloxetine 30 mg twice daily. it is effective for pain and also for depression. consult your specialist doctor discuss with him or her and start taking the medicines after their consent. for more information consult a neurologist online --> <link>
my friend is suffering from neuropathic pain after a thalamic stroke. please help.