Male testosterone boosters are generally safe when taken as directed and under the supervision of a doctor. However, they may have some side effects or interactions with other medications or supplements. Some of the common side effects of male testosterone boosters include acne, hair loss, enlarged prostate, mood swings, aggression, and liver damage. Some of the interactions may include blood thinners, diabetes medications, and steroids. Therefore, it’s important to talk to your doctor before taking any male testosterone boosters, especially if you have any underlying health conditions or are taking any other medications or supplements.