What is a common effect of LSD use?

The choice of sensory crossover as the common effect of LSD use is accurate because LSD, or lysergic acid diethylamide, is known to cause alterations in perception, leading to synesthesia. This phenomenon allows users to experience a blending of sensory modalities; for instance, they might hear colors or see sounds. This cross-sensory experience is a hallmark of LSD use and contributes to the profound alterations in consciousness that many users report.

Other effects mentioned, such as decreased blood pressure, heightened awareness, and increased cognitive function, may not be as universally recognized or distinctively associated with LSD. The experience of sensory crossover, however, is a widely reported and notable characteristic of LSD's psychedelic effects, making it a key focus for understanding its impact on perception and consciousness.