hormones

adhd antidepressant antidepressants atom atomic atoms behavior behaviors behaviour biochemical biochemistry biological biology bipolar body brain character chemical chemistry cycle danger depressed depression disorder disorders dopamine drive drug drugs endorphin endorphins estradiol estrogen estrogens feeling feelings flee flight fluoxetine gland glands happiness happy health healthcare hormone hormones human immune love medical medication medicine medics menopause metabolic metabolism molecular molecule molecules mood moods negative neurotransmitter neurotransmitters noradrenaline oxytocin pain panic personality pharmaceutical pharmacy pill pills positive prozac psychology reflex reflexes rush serotonin sex sexual sleep steroid stimulation stress substance substances swing swings system therapy treat treatment wake