Stimulants, or "stims" as they are commonly known is a blanket term used to describe a variety of substances taken by terrans, both for military and recreational use. These substances consist of a powerful mix of synthetic adrenaline, endorphins, and a psychotropic aggression enhancer. Stimulant colors include red and green. Stimpack manufacturers meticulously develop and test new batches to prevent issues arising from the formula.
An individual on stims benefits from greatly increased speed,, reflexes, aggression, morale muscle density the ability to deal with stress, and overall combat effectiveness. Tissue damage may result from usage however, the skin becoming 'knobbly' at the site of infusion/injection. Possible long term side-effects include, but are not limited to, insomnia, weight loss, mania/hypomania, seizures, paranoiac hallucinations, internal hemorrhaging, and cerebral deterioration. An individual who has taken excessive stimulants is easily recognizable, courtesy of "pupilless" eyes, although sometimes the eyes appear completely dark. Stimulants are lethal in the long run.
The Terran Confederacy declared that all of these side effects were nominal and well within Confederate safety margins and to this end, stimpacks were installed into CMC-400 and later-model CMC-660 combat suits for use by marines and firebats respectively. Even without the in-built devices, Confederate Marines still had access to these substances. The Terran Dominion has continued this trend and sparked mass controversy as a result. Nonetheless, both Dominion commanders and Dominion Marines themselves stand by the use of stims as essential to their continued survival and effectiveness on the battlefield. The Mar Sara Colonial Militia was a notable exception regarding the use of stimulants, due to too many of its soldiers becoming addicted to them.
At least partially due to this addiction, stims see widespread use in terran civilian society. It is possible for an individual to break this addiction, though requires a great deal of time and effort on the individual's part.
Although the term "stims" is essentially a blanket term, there are a few other drugs with similar names that serve very different purposes. These include;