Yale-Brown Obsessive-Compulsive Scale (YBOCS) - a questionnaire-based measure of obsessive and compulsive symptom frequency (severity), present or past. Designed for ages 15 and above. Also see CY-BOCS.
Yohimbe - an African plant (Corynanthe yohimbe) whose bark is used as a herbal remedy (anxiolytic and stimulant). This herb works as a short-term MAOI and may have aphrodisiac qualities. CAUTION: Yohimbe should not be taken with other MAOIs, or by persons with high blood pressure, cardiac disorders, diabetes, glaucoma, or mental instabilities (especially bipolar disorder). Though the aphrodisiac qualities may sound tempting, high doses may result in erections that last an uncomfortably long time (up to eight hours) in which case there is risk of vascular damage or even gangrene. The effects of yohimbe on anxiety disorders may be very unpredictable because the plant's complex chemical nature causes it to act as both a stimulant and tranquilizer.
Yohimbine - an alkaloid derivative of yohimbe. Unlike yohimbe which works as an MAOI, yohimbine is not an MAOI.