If a man takes Plan B, it generally does not have the intended effect of preventing pregnancy because Plan B works by delaying ovulation, which men do not experience. In terms of side effects, a man may experience some mild, temporary symptoms such as nausea, fatigue, headache, and mood changes due to the hormones in the pill, but taking a single dose is unlikely to cause serious harm or lasting effects. However, the medication is not designed for male biology, and prolonged intake could lead to hormonal imbalances and potential health risks. It is not effective or recommended as birth control for men.
Specifically, Plan B contains levonorgestrel, a synthetic hormone that mimics progesterone. In women, it works primarily by delaying ovulation to prevent pregnancy after unprotected sex. Since men do not ovulate, the drug does not prevent pregnancy in them. Short-term side effects for men may include mild nausea, fatigue, headaches, and mood fluctuations, while long-term use could potentially cause feminizing changes like breast tissue growth and altered hormone levels, which carry health risks.
In summary, a man taking Plan B may experience temporary hormonal side effects but it does not serve as an effective contraceptive for men.
