 [ Symptoms ] noticing thinning hair what could be causing this more minocycline or neurontin  i just noticed the thinning hair 2 days ago i have been on minocycline for the past 2 months   50mg once a day for hormonal acne i have also been on neurontin for the past 1 month   100mg twice a day for bipolar i am thinking one of these must be causing the hair thinning but i do not know which one is more likely to be the cause based on the common side effects of each med how long i have been on them and the dosage amounts [ Disease ] ever since i was put on bisoprolol and verapamil i have noticed hair loss