Alcohol withdrawal with seizures. Next.

I have my close relation brother who is an alcoholic. From long time but he used quit & again start Heavily from last 3 years he is undergoing some issues while he stopping to drink. In last 3 years he stopped alcohol many times but in that he got seizures also 3 times whenever he got seizures doctors have suggested for diazepam & zapiz . In which he used to be normal after 2 to 3 days then he stops. But this time means 3rd time he got seizures now we took him to hospital they asked to start long time medications & given levepsy 500mg 1 in morning & 2 in night within a week he got skin allergy & rashes so again we approached the doctor he has changed the tablet to zeptol 200mg morning 1 & evening 1 but still again same problem occurred after giving dexona injection + allergy tablet. Again we took him yesterday doctor again changed the tablet to gardinol 60mg only once in the night. But still there no improvement after same injection & tablets. Any suggestions what to do next.