My dad is 65 years old and is prescribed with Specta (doxepin) 125-150 Mg , he is using this since last 8 years. he was prescribed with the medicine after an emergency. He is having constipation problem ,even small sudden noise will send shock waves.
But of late(last 8 months) he is experincing tremors in his right hand & some times his tongue slips, Is it a sign of parkinson or side effect of doxepin. what do you recommend now