Clenbuterol is an adulterant frequently found in cocaine and heroin. Clenbuterol tends to cause a tetrad of
- palpitations, and
Treatment is supportive.
Centers for Disease Control and Prevention (CDC). Atypical reactions associated with heroin use--five states, January-April 2005. MMWR Morb Mortal Wkly Rep 2005; 54:793.