Dilated pupils, or mydriasis, can be caused by various substances, both legal and illegal. Here are some examples:
Psychedelics: These substances, including LSD (acid), psilocybin (magic mushrooms), and mescaline (peyote), often lead to pupil dilation.
Stimulants: These substances increase activity in the body's central nervous system. Examples include cocaine, amphetamines (like methamphetamine or "meth"), and MDMA (Ecstasy or Molly).
Anticholinergics: These medications block a neurotransmitter called acetylcholine, leading to various effects including pupil dilation. Examples include certain antihistamines, tricyclic antidepressants, and some medications used for Parkinson's disease.
Certain SSRI antidepressants: Some selective serotonin reuptake inhibitors, a type of antidepressant, can cause dilated pupils.
Atropine and similar substances: Atropine is a medication used in various medical settings, including eye exams and certain surgeries, to dilate the pupils. It can also be found in some poisonous plants.
It's important to note that dilated pupils are just one potential effect of these substances and can occur along with a wide range of other effects, both positive and negative. Moreover, pupil dilation does not necessarily indicate substance use, as it can be a normal response to low light, excitement, or other factors.
If you believe that you or someone else may have used a substance and are experiencing harmful side effects or a medical emergency, seek medical attention immediately. Always use medications as directed by a healthcare provider, and avoid illegal substances.