I've been told that there is a over-the-counter product that treats bacterial vaginitis, is that true?

Boric Acid?: I would recommend the standard treatment of oral or vaginal flagyl. Intravaginal boric acid 600 mg at bed time provides symptomatic relief. The frequency can be gradually decreased to once or twice a week. You could try a probiotic preparation such as vsl #3 with 110 billion colonies of probiotic bacteria per capsule, but this therapy is unproven.