Stimulants (also referred to as psychostimulants) are psychoactive substances that predominantly increase activity in the brain and induce temporary alterations in either mental or physical function or both. Examples of these kinds of effects may include enhanced alertness, wakefulness, and locomotion, among others.
Stimulants are also occasionally referred to by the catch-all term "uppers". Depressants or "downers", which decrease mental and/or physical function, are in stark contrast to stimulants and are considered to be their functional opposites.
Stimulants are widely used throughout the world as prescription medicines and without prescription both as legal substances and illicit substances of recreational use or abuse.
The effects listed below are based upon the subjective effects index and personal experiences of PsychonautWiki contributors. These effects should be taken with a grain of salt and will rarely (if ever) occur all at once, but heavier doses will increase the chances of inducing a full range of effects. Likewise, adverse effects become much more likely on higher doses and may include serious injury or death. These effects are listed and defined in detail within their own dedicated articles below:
Alongside of these a variety of non-essential secondary effects are often present. These generally include but are not limited to:
- Focus enhancement
- Physical euphoria
- Cognitive euphoria
- Appetite suppression
- Memory enhancement
- Analysis enhancement
- Teeth grinding
- Increased music appreciation
- Ego inflation
- Time distortion - This can be described as the experience of time speeding up and passing much quicker than it usually would when sober.
The effects which occur during the offset of a stimulant experience generally feel negative and uncomfortable in comparison to the effects which occurred during its peak. This is often referred to as a "comedown" and occurs because of neurotransmitter depletion. Its effects commonly include:
Experience reports can be found here:
The chemicals below have a varying degree of stimulant effects. Some of the chemicals have a minimal stimulant effect while others may have a strong stimulant effect. Many of these substances possess other qualities including entactogenic or nootropic effects.