Substance P Effects

Aching or tension in the back, commonly arising from sustained muscle tension, poor posture, or vasoconstriction during stimulant or psychedelic use.

A diffuse, heavy physical discomfort involving tension, pressure, and malaise in the torso and limbs, commonly reported with tryptamines and phenethylamines.

A noticeable acceleration of heartbeat that can range from a subtle awareness of one's pulse to a forceful, rapid pounding felt throughout the chest, neck, and temples. This effect is among the most commonly reported physiological responses to psychoactive substances and often accompanies stimulation, anxiety, or physical exertion during intoxication.

An uncomfortable sensation of queasiness and stomach discomfort that may or may not lead to vomiting, often occurring during the onset phase of many substances.

A suppression of negative physical sensations such as aches and pains, ranging from dulled awareness of discomfort to complete inability to perceive pain.

A state of heightened physical and mental energy characterized by increased wakefulness, elevated motivation, and a subjective sense of vigor that pervades both body and mind. Users often report feeling electrically alive, with a buzzing readiness to move, talk, and engage that can range from a pleasant caffeine-like lift to an overwhelming, jittery compulsion to act.

Impaired thermoregulation causing unpredictable fluctuations between feeling hot and cold, with risk of hyperthermia or hypothermia.

Vasodilation is the relaxation and widening of blood vessels, leading to increased blood flow, reduced blood pressure, and visible effects such as flushing and bloodshot eyes, most commonly associated with cannabinoids, nitrites, and alcohol.

Intense feelings of apprehension, worry, and dread that can range from a subtle background unease to overwhelming panic attacks with a sense of impending doom, often amplified by the substance's intensification of one's existing mental state.