How long can the effects of LSD last?

The effects of LSD, also known as lysergic acid diethylamide, can indeed last up to 12 hours. While the peak effects typically occur within the first few hours after ingestion, the overall duration of the experience is longer and can vary based on several factors, including dosage, individual metabolism, and the specific strain of the drug. Users usually report that the effects begin to diminish after about 8 hours, but residual effects or afterglow effects can linger for a total duration not exceeding 12 hours.

This timeframe aligns with the pharmacological profile of LSD, which is a potent hallucinogen known for its ability to alter perceptions, mood, and cognitive processes. Understanding this duration is crucial for individuals in both healthcare and law enforcement, as it impacts how one might respond to someone under the influence, manage potential side effects, and approach treatment or recovery protocols.