Generally speaking, topicals have far less cannabis in them than what you smoke, vape or eat, but even if they didn’t, you wouldn’t feel high with this application method. You also don’t have to worry about failing a drug test with topicals, as the cannabis is absorbed through the skin and never enters the bloodstream.
Cannabis-infused lotions, salves, oils, sprays, and other transdermal methods of relief work by binding to a network of receptors called CB2. These CB2 receptors are found throughout the body and are activated either by the body’s naturally-occurring endocannabinoids or by cannabis compounds known as “phytocannabinoids” (e.g., THC, CBD).
Even if a topical contains active THC, it still won’t induce that intense “high” you’d get from smoking or ingesting cannabis. With most topicals, cannabinoids can’t breach the bloodstream; they only penetrate to the system of CB2 receptors. Transdermal patches, however, do deliver cannabinoids to the bloodstream and could have psychoactive effects with a high enough THC content.