Can Antibiotics Delay Your Period? GYNELLA Period Delay Treatment McKeevers Chemists UK & N. Ireland Can Periods Be Delayed Intentionally? Yes, they can. The most commonly used medications are progesterone based hormones, such as: Norethisterone Medroxyprogesterone acetate These are usually started 35 days before the expected date Irregular Periods Why Is My Period Late? Plix Glutathione, Detoxification & Hormones: Benefits for Health and Hormonal Balance Glow by Hormone University US Why is my period late? 11 reasons (besides pregnancy)