Monistat 1-Day Yeast Infection Treatment is the number one gynecologist-recommended brand for over-the-counter treatments for yeast infections.* Designed with busy women in mind, this single-dose ointment is prefilled and easy to use. Whether you’re working out at the gym, hustling at work, or just need to get back to running errands comfortably, you can rely on Monistat 1 Day Treatment. Clinically tested by gynecologists, this Monistat 1 Day Treatment ointment contains 300mg tioconazole, an antifungal medicine, to cure the infection at the source.