EXHIBIT 21.1
PSYCHEMEDICS CORPORATION
Subsidiaries
Psychemedics Corporation wholly-owns the following companies:
| Name | Country of Incorporation | 
| 1. Psychemedics International, LLC | Delaware, USA | 
| 2. Psychemedics Laboratórios Ltda | Brazil | 
| (owned jointly by Psychemedics Corporation | |
| and Psychemedics International, LLC) |