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On drug excretion. barbiturates. Describe the mechanism by which the problem arises. In medicinal use, drugs are usually administered with the best of intentions, which is to have a beneficial therapeutic effect.
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Diffusion of oxygen happens efficiently because there is a concentration gradient from air in the alveoli to blood in the capillaries; the distance through the alveoli walls, tissue fluid and capillary walls is small; and the total surface area of all the alveoli is large.
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As such, it is a normal, but short-lived response to a potentially threatening event. Anxiety becomes a medical problem when it is excessive, long lasting or inappropriate and incapacitating. Then it can be called вanxiety neurosisв, or an anxiety syndrome. According to the DSM-IVanxiety syndromes are obsessive-compulsive disorder, panic attacks for no apparent reason, phobias and post-traumatic stress disorder.
Oxygen must be administered. An antihistamine, for example chlorphenamine, can be given by slow intravenous infusion after adrenaline and for in and circulating blood volume and intravenous aminophylline or nebulized salbutamol in addition to oxygen are indicated. Intravenous corticosteroid can also be given to prevent further deterioration. of salbutamol, aminophylline and antihistamines.
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Initially the results looked promising, with some patients with severe disease showing some degree of improvement after surgery. However, it now appears that deterioration with time is likely, although trials are still being evaluated. Alternative approaches have been considered using genetically modified cells, for example fibroblasts from the skin, or retinal cells as sources of dopamine production.
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The liver, salivary glands, sweat glands and glands of the reproductive organs also produce abnormal secretions.