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Psyadon Pharmaceuticals has spent nine months working to enroll the 18 patients it needs for its phase 3 clinical trial involving its treatment for Tourette syndrome.

The Germantown company’s candidate, ecopipam, also targets Lesch-Nyhan disease, a genetic disorder that affects as many as 1,000 Americans, disrupting their ability to walk and causing self-mutilation.

Although Psyadon usually is not directly involved in its clinical trials — it usually uses companies called contract research organizations, which conduct trials for drug makers — it often tracks disease-related patient advocacy groups and sometimes uses this information to raise awareness of the trial, said CEO Richard Chipkin.