“Slam” has many underworld variants. Slam improves the response-time and strength of the user via activation of certain receptors which increase Adrenaline production, and the production of endorphins and similar distress chemicals. It’s mixed with another drug that increases endurance by bonding to Hemoglobin, then carrying even more oxygen then normal hemoglobin could, as well as carrying away more fatigue poisons. Overdose can cause muscles to pull too hard and suddenly, breaking bones or tearing themselves in two. The heart and lungs can be overstrained. Any dosage can alter mood and attitude, making the person (Typically) either restless or angry. It is used by ground troops and is typically injected.