Hence, it is a common symptom of substance abuse. Other chemical reactions in your brain can be caused by specific drugs, mainly by psychoactive stimulants. It’s an involuntary action or response, and it’s something you cannot control. When it comes to powerful feelings such as love or hatred, your pupils tend to expand whenever you think of someone that makes you feel that way. Your pupils can also dilate due to chemical reactions in your brain caused by emotions. For example, your pupils will expand whenever it’s dark in order to let in more light and allow you to see clearer. The reason behind its reaction has to do with factors such as light, distance, or even emotion. Mydriasis, or as we know it, dilation of the pupils, is when the black center of the eye, or the iris, expands and diminishes. Keep reading to find out what drugs cause dilated pupils and what you can do to help your loved one. If you have high suspicions that someone close to you might be falling into drug addiction, you must remain observant and watch out for any signs, such as dilated pupils, which is one of the most common symptoms. It’s difficult to know whether a close friend or a loved one is dealing with drug abuse.

However, these are only the cases that have been reported. WHO, also known as The World Health Organization, has reported that about 270 million people have fallen into drug abuse in the previous year.

Dilated eyes