Category: P

Having patches of nonpigmented hair or skin due to the absence of melanocytes in those areas.  

Extreme obesity, often with decreased lung function and sleepiness. Obesity, decreased pulmonary function, and polycythemia. A rare condition distinguished by severe obesity, shallow breathing, excessive sleepiness, and obstructive sleep apnea is referred to as Pickwickian syndrome. The origin of this syndrome remains unidentified. Generally, the symptoms tend to ameliorate with weight reduction; however, addressing the…

Nerve endings capable of being stimulated by light, such as the rods and cones of the retina. Light strikes the photoreceptor (rods and cones), leading to a structural change in a chemical pigment that activates an enzyme. The net effect is that the movement of sodium is altered, leading to a nerve signal that is…

Drug that constricts blood vessels, raising blood pressure; dilates the pupils of the eyes, and relieves nasal congestion. It is given by injection to raise blood pressure and is combined with other drugs in many nasal sprays and eyedrop preparations to relieve symptoms of allergy and the common cold (e.g., runny nose). A drug that…

Anticonvulsant used to treat petit mal. Adverse effects include gastrointestinal upset, drowsiness and other signs of central nervous system depression, and blood abnormalities. An anticonvulsant drug used to prevent or reduce petit mal fits in epilepsy. It is administered by mouth; side-effects may include dizziness, drowsiness, nausea, and loss of appetite.  

Laxative, found in many preparations under a variety of trade names. Adverse effects include abdominal cramps and possible allergic reactions. An irritant laxative administered by mouth, usually given at night to act the following morning. Side-effects may include stomach cramps.  

Antihistamine, found in many preparations for allergies and respiratory infections, used to treat rhinitis, skin rashes, and pruritis. Adverse effects include sedation, dry mouth, and rapid heart rate. An antihistamine used to treat allergic reactions such as hay fever and urticaria. It is administered by mouth or is applied to the skin in an ointment;…

In psychoanalytic theory, the third stage in a person’s development, usually between the ages of 3 and 6, when awareness and/or self-manipulation of the genitals is a prime source of pleasure.  

General term for affliction, ailment; historically, refers to the fatal epidemic disease bubonic plague transmitted by the bite of an infected rat flea. A fatal epidemic disease, like the plague.  

Toxic condition brought on by ingestion or inhalation of a pesticide. A chemical injury caused by exposure to substances intended to kill insects or vermin. Pesticide poisoning can occur in people who handle or are otherwise exposed to the chemicals used to kill insects. Exposure to pesticides can involve the skin, particularly of those who…