The antonyms for the term "Central Muscle Relaxants" are "stimulants" or "excitatory drugs". Instead of reducing muscle tension, stimulants increase it by activating the central nervous system. Examples of stimulants include coffee, cocaine, amphetamines, and caffeine. These drugs increase heart rate, blood pressure, and alertness, thereby increasing muscle tension in the body. They are used to treat conditions such as narcolepsy, attention deficit hyperactivity disorder (ADHD), and depression. In contrast, Central Muscle Relaxants are used for the treatment of muscle spasms, tension headaches, and fibromyalgia, among others, by decreasing muscle tension and promoting relaxation.