Category: O
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Oxymetazoline hydrochloride
Over-the-counter decongestant nasal spray (trade name Afrin) used in the treatment of nasal congestion and allergy. This drug should not be used longer than three consecutive days without a physician’s specific orders to do so. Otherwise, severe nasal irritation can result.
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Oxaprozin
Nonsteroidal anti-inflammatory agent used in the once-a-day oral treatment of arthritis; side effects include stomach irritation and intestinal bleeding. A nonsteroidal anti-inflammatory drug (NSAID). Oxaprozin (Daypro) is used to manage the symptoms of acute or chronic osteoarthritis or rheumatoid arthritis. Oxaprozin has pain-relieving, fever-reducing, and anti-inflammatory properties. It is available only by prescription.
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Oxacillin
Antibiotic of the penicillin family that is resistant to penicillinase, the penicillin-destroying enzyme released by some bacteria, especially staphylococci. It is used to treat severe infections caused by penicillinase-producing staphylococci. Adverse effects include allergic reactions and gastrointestinal disturbances. An antibiotic used to treat infections caused by a wide variety of bacteria. It is administered by…
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Ovotestis
Hermaphroditic gonad, containing both ovarian and testicular tissue. A gonad that contains both testicular and ovarian tissue.
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Output
Amount produced, ejected, or expelled. Often used in reference to cardiac output, the amount of blood pumped by the heart each minute. Information sent from a computer to an external device such as a display screen, disk drive, printer, or modem. The productive energy supplied by a circuit or device. It is quantified in terms…
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Osteodystrophy
Defect in bone development, usually due to renal disease or disturbances in phosphorus and calcium metabolism. The general term for any defective bone formation. Any generalized bone disease resulting from a metabolic disorder. Renal osteodystrophy is the characteristic change in bones occurring in chronic kidney failure. Any widespread bone irregularity stemming from metabolic disorders is…
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Osteoblastoma
Benign tumor of bone and fibrous tissue, occurring in the vertebrae, femur, tibia, or arm bones, especially in young adults. Symptoms include pain and resorption of normal bone tissue. Treatment is by surgical excision. A large, benign tumor of osteoblasts in a patchy osteoid matrix. It occurs mostly in the vertebral columns of young people.…
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Orthorexia nervosa
Unhealthy fixation on eating healthy food. The patient may avoid certain types of food, such as those containing fats, preservatives, or animal products. It is characterized by the pathological obsession for biologically pure food, which leads to important dietary restrictions. Patients exclude from their diets foods that they consider to be impure because the food…
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Orphenadrine
Skeletal muscle relaxant used in several forms to treat severe muscle strain and Parkinsonism. Adverse effects include rapid heartbeat and dry mouth. A drug that relieves spasm in muscle, used to treat all types of parkinsonism. It is administered by mouth or injection; side-effects may include dry mouth, sight disturbances, and difficulty in urination. A…
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Organic disorder
Disorder caused by a structural or other detectable change in an organ. A disorder associated with changes in the structure of an organ or tissue. Compare functional disorder.