narcolepsy, Frequent uncontrollable episodes of falling asleep; excessive sleepiness, narcotic, Addictive substance that blunts senses; opioids, narcotic analgesics, Pain relievers that bind opioid receptors, nausea, Feeling the need to vomit, necrosis, Death of tissue cells, negative feedback, Hormone secretion inhibits its own stimulators, neonate, Newborn infant from birth to 1 month, neoplasm, Tumor, nephritis, Inflammation of the kidneys, nerve, Fibers transmitting electrical messages in body, nerve action potential, Voltage changes transmitting nerve impulse, nerve block, Local anesthetic preventing pain transmission, neuralgia, Pain along a nerve, neuromuscular junction, Synapse between nerve and voluntary muscle, neuropathy, Disease or damage of nerves, neurosis, Mild mental illness with anxiety, neurotransmitters, Chemicals that cross synapse between neurons, neutropenia, Deficiency of white blood cells, neutrophil, Granulocyte white blood cell, nicotinic, Receptors activated by nicotine, nitrates, Vasodilating drugs used for angina, nocturnal enuresis, Bedwetting at night, nonsteroidal antiinflammatory drug (NSAID), Pain-relieving antiinflammatory drug, not corticosteroid, norepinephrine, Hormone causing vasoconstriction and raising blood pressure, nystagmus, Rapid involuntary rhythmic eye movement, obesity, Excess body fat condition, obsessive-compulsive disorder, Repeated actions performed for comfort, oligodactyly, Fewer than five digits, onset, Time until drug effect begins, opacities, Not transparent, opportunistic infection, Infection affecting immunocompromised people, optic, Pertaining to the eyes, oral, Used in or taken through mouth, oral contraceptives, Pregnancy-preventing pills with estrogen and progesterone, organophosphate, Irreversible cholinesterase inhibitors used as insecticides, orthopnea, Breathing difficulty while lying flat, orthostatic hypotension, Blood pressure drop when standing, osteoarthritis, Cartilage breakdown causing joint pain and stiffness, osteomalacia, Bone softening from vitamin D deficiency, osteoporosis, Low bone density with brittle bones, otitis media, Middle ear inflammation from infection, ototoxicity, Drug-related ear or nerve damage, outpatient treatment, Medical care without overnight hospital stay, ovaries, Glands producing eggs, estrogen, progesterone, overdose, Excessively large drug dose, over the counter (OTC), Medication sold without prescription, ovulation, Release of egg from ovary, oxidation, Chemical reaction adding oxygen, oxygen, Essential colorless, odorless life-supporting gas, oxytocin, Pituitary hormone causing uterine contractions and milk flow, pacemaker, Implanted device producing normal heartbeat, palate, Roof of the mouth, palliative treatment, Treatment relieving symptoms without cure, pallor, Abnormally pale skin, palpebral fissures, Eyelid folds, palpitation, Abnormally rapid and strong heartbeat, pancreas, Gland producing digestive enzymes and hormones, pancreatitis, Inflammation of the pancreas, panic disorder, Anxiety attacks worsened by stress, paralysis, Inability to move a muscle, paralytic ileus, Reduced or absent ileum motility, paranoia, Mental disorder involving delusions, parasympathetic, Autonomic division opposing sympathetic system, parathyroid glands, Neck glands regulating blood calcium, parenteral, Administration outside digestive tract, Parkinson disease, Dopamine deficiency causing stiffness and tremor, parkinsonism, Restlessness, tremors, rigidity, masked face, paroxysmal, Sudden onset of symptoms, partial seizure, Localized abnormal electrical brain discharge, pathogen, Disease-causing substance or microorganism, pedal, Relating to the feet, peptic ulcer disease (PUD), Erosion in upper digestive tract lining, perception, Nerve impulse going to central nervous system, peripheral resistance, Opposition to blood flow in vessels, peripheral vascular disease (PVD), Narrowed limb vessels reducing blood flow, pernicious anemia, Vitamin B12 deficiency anemia from intrinsic factor lack

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