Morphine

Auditory distortion

Double vision

Nausea

Difficulty urinating

Itchiness

Constipation

Physical euphoria

Pupil constriction

Dream potentiation

Internal hallucination

Cognitive euphoria

Irritability

Thought deceleration

Sedation

Appetite suppression

Respiratory depression

Pain relief

Cough suppression

Muscle relaxation

Anxiety suppression

Compulsive redosing

Skin flushing

Decreased libido

Auditory acuity suppression

Orgasm depression