Metformin almost always gives you 'the bloat'. You should *NEVER* take it without food. You should not really drink alcohol on Metformin and never ever on an empty stomach with or without Metformin. The bad metal taste should go after a few weeks. Also, *very important* is to *NEVER* get dehydrated while using Metformin. You must always drink a good amount during the day. Tht is vital. If not, you run a serious risk of increasing your chances of some very nasty and dangerous side effects... and even lactic acidosis.