When Prescribing Metronidazole (Flagyl) to Treat Bacterial Vaginosis, Patient Education

When prescribing metronidazole (Flagyl) to treat bacterial vaginosis, patient education would include:

A) Metronidazole is safe in the first trimester of pregnancy.
B) Consuming alcohol in any form may cause a severe reaction.
C) Sexual partners need concurrent therapy.
D) Headaches are a sign of a serious adverse reaction and need immediate evaluation.