What Are the Effects of Using Primobolan and Testosterone Together? Primobolan (chemical name: Methenolone) and Testosterone are commonly used anabolic steroids. They are often utilized to enhance muscle mass, verhoog de sterkte, vet verminderen, and improve overall athletic performance. Combining these two steroids is a common practice in bodybuilding and sports, as they complement each other to amplify results. Echter, this …