1 Higher doses can cause impairment of memory, judgment and coordination, irritability, paranoia,3 and suicidal thoughts. Some people experience the opposite of the intended effect, such as agitation or aggression.
Adj. 1. vertical-at right angles to the plane of the horizon or a base line; a vertical camera angle; the monument consists of two vertical pillars supporting a horizontal slab; measure the perpendicular height. perpendicular.
1. Mathematics A line or plane perpendicular to a given line or plane. 2. A perpendicular position. 3. A device, such as a plumb line, that is used in marking the vertical from a given point. 4. A vertical or nearly vertical line or plane.