This feels to me like it's not good advice, with the same theme as "drink alcohol".
People report feeling good despite taking a depressant, and self-medicate their depression with alcohol.
People report feeling good despite taking a depressant, and self-medicate their depression with alcohol.
Worth noting that "depressant" in the drug sense is anything which slows down the action of the central nervous system, it doesn't have anything to do with the mental state of depression.
Some of the drugs most known for bringing on a state of euphoria are depressants (eg; opiates).