Azithromycin
"I was prescribed this about Nov 2014, 1 tablet a day.  After two weeks of being afraid to step over the doorway I stopped taking it, it caused severe stomach cramps, diarrhoea and nausea.  My consultant had prescribed it to take to try to stop me getting infections and possibly reduce my steroid intake (maintenance dose of 20mg per day, been on them daily since March 1992 for asthma).  Last month he persuaded me to try again but to take alternate days for a month and then if ok ask my GP to add to my prescription.  From the start the nausea, diarrhoea, stomach cramps came back, followed by itchiness, headache, shooting pain in right ear.  I have persevered for the month but will not be asking GP for more"