https://www.blvdcenters.org/ecstasy-rehab-treatment-centers - While Molly has spent years as one of the most popular street drugs on the planet, it’s also one of the deadliest – particularly when mixed with other drugs or alcohol. While the hallucinogenic effects may seem euphorically pleasing, they can also cause headaches, chest pains, nausea, vomiting, seizures…and even loss of consciousness.