Definition: Antalgic refers to a disease characterized by increased heart rate, anxiety, and sleeplessness due to inadequate oxygen delivery or insufficient blood flow to the brain. It can be caused by several conditions such as hypothyroidism or thyroid issues, as well as other diseases like congestive heart failure or diabetes mellitus. Antalgics often lead to significant stress on mental health as they disrupt sleep patterns, which in turn affects mood and energy levels.