Etho Primobolan 100mg/10ml is a steroid injectable solution that is used to increase levels of testosterone in the body. It is used by bodybuilders and athletes to increase muscle mass, strength, and reduce body fat. It is an anabolic-androgenic steroid that works by increasing muscle protein synthesis and red blood cell production. Primobolan also helps to boost metabolism and increase endurance and stamina. Possible side effects include acne, hair loss, and changes in libido.