A woman complains of an offensive fishy smelling yellowish discharge without pruritus. pH of discharge is >4.5. Gram stained vaginal smear shows a reduced number of lactobacilli with large number of Gardnerella vaginalis. What is the best treatment option for this patient?
Clinda mycine 300 mg twice daily x7 days Metronidazole 500 mg twice daily x7 days Metronidazole 2 gm as a single dose Metronidazole vaginal gel once a day x7 days