And Oscar Wilde? Well, no doubt the poet did see tulips on his legs as he walked out into the morning light after a night of drinking absinthe at a local bar. Poets are like that. The rest of us wouldn’t see a tulip after drinking absinthe any more than we would after a gin and tonic.
Another tipoff is that their article uses an image from wikipedia, which also reports that it is impossible for absinthe to cause hallucinations. Though the medical community might not agree with that estimation. Apparently thujone, the chemical in wormwood is still pretty mysterious.
Thujone is structurally similar to tetrahydrocannabinol, the active constituent of marijuana. If thujone-containing absinthe is consumed, the effects might include mild hallucinations.
The How Stuff Works article also fails to mention that commercial absinthe today has about 10 parts per million of thujone, while absinthe back in Wilde’s day had about 260 parts per million (Science News Online).