neurotransmitters

adhd aggression aggressive alert alertness anergia anhedonia antidepressant antidepressants anxiety anxious appetite atom atomic atoms attention behavior behaviors behaviour biochemical biochemistry biological biology bipolar body brain character chemical chemistry cognition cognitive compulsion compulsive concentrate concentration crave craving cycle danger deficit depressed depression disorder disorders dopamine drive drug drugs dysfunction emotion emotional emotions endorphin endorphins energy estradiol estrogen estrogens feeling feelings flee flight fluoxetine formula formulas gland glands happiness happy health healthcare hormone hormones human immune impulse impulsive impulsivity love medical medication medicine medics memory menopause metabolic metabolism molecular molecule molecules mood moods moody motivated motivation negative neurotransmitter neurotransmitters noradrenaline obsessed obsession obsessive oxytocin pain panic parkinson personality pharmaceutical pharmacy pill pills pleasure positive prozac psychology reflex reflexes reward rush serotonin sex sexual sleep steroid stimulation stress substance substances suicide swing swings system therapy treat treatment wake