What is a common side effect of using H2 receptor blockers?

H2 receptor blockers, commonly used to reduce stomach acid, typically have a side effect profile that includes a variety of gastrointestinal and neurological symptoms, but dry mouth, hoarseness, and discoloration of body fluids are less commonly associated with them. The most accepted understanding is that the side effects noted for H2 receptor antagonists primarily focus on factors such as headaches, dizziness, or gastrointestinal disturbances.

Selecting "none specified" acknowledges that H2 receptor blockers do not have a widely recognized or common side effect that fits neatly into the other options provided. This reflects a more accurate representation of what patients on these medications can expect, steering clear of implying that the other symptoms are typical or expected with H2 receptor blocker use.