Which side effect is NOT associated with Baclofen?

Baclofen is a muscle relaxant commonly used to manage spasticity, particularly in neuromuscular conditions. It works by inhibiting excessive motor activity in the central nervous system. The side effects associated with Baclofen include muscle weakness, drowsiness, and fatigue. These effects arise because Baclofen can depress the central nervous system, leading to a reduction in muscle tone and a calming effect.

In contrast, rapid heart rate is not a typical side effect of Baclofen. This medication does not typically stimulate the cardiovascular system to induce an increased heart rate; instead, it may lead to a sedative effect that does not align with symptoms of cardiovascular stimulation. Therefore, the correct answer indicates that rapid heart rate is not commonly associated with Baclofen use, distinguishing it from the other options that align closely with the known side effects of the drug.