Flashback phenomenon and residual neurological deficits after the use of "bath salt" 3, 4- methylenedioxypyrovalerone.

Background: The use and abuse of designer drugs has been recognized for decades; however there are many derivatives of compounds that make their way into the community. Abuse of compound(s) known on the street as "bath salt" is on the rise.

Methods: We report the case of a 33-year-old man who complained of "flashbacks" and right arm shaking that followed a night of "bath salt" snorting. The active compound methylenedioxypyrovalerone methamphetamine (MDPV) was confirmed; however, analysis of three different "bath salt" products showed difference in their active components.

Results: The patient's symptoms remained stable and he was discharged home after observation in the emergency department with instructions to return for any symptom progression.

Conclusion: Practitioners should be aware of the abuse of the compounds and that not all "bath salt" products contain MDPV.