Hi My husband age 31 hardly ever ill, Had some skin infection in his hands, the doctor didnt really know what it was but gave him Flucloxacillin last tuesday, he started having stomach pains thursday lunch time by last night it was so bad he was in a lot of pain, paracetamol and ibuprophen were not helping, he had chills in the night too. Neadless to say he hasnt taken one since 4pm yesterday. Today he isnt in as much pain just tired and ache and feeling cold . He is now saying he feels like his kidneys are aching. Any advice He is 31 years old 5 foot 9 and 12 stone