[Doodil]

Does it always only heal 15 hp? There is a check in the plugin that checks if the actual playerhealth + bottlehealth is bigger than 175 it only gives health up to 175.

If it always heals for only 15 health then you probably execute the config too late. Check if the sm_drunkenheal_amount value really is higher than 15

sm_drunkenheal_amount 100
or
sm_drunkenheal_amount "100"

should both work