bacterial infection
"I had a vaginal infection, and was prescribed Flagyl to cure it.  I hated the immediate awful taste in the mouth, and it dissolved immediately upon hitting my tongue.  I only experienced the awful taste and some slight stomach upset as side effects.  The infection began to clear up after 3 days of a 7 day prescription.  I recommend it, and drink something fruity with it.  Also, DO NOT DRINK ALCOHOL AT ALL while on this medication, OR FOR 3 DAYS AFTER YOU STOP TAKING IT.  You WILL have severe vomiting, heaving and dizziness."