Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0040822 (tremor)
 18,428 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Alpha methyltyrosine (alpha-MPT) was administered to 52 patients from 4 days to 10 months; 22 patients were cases of pheochromocytoma and 20 had essential hypertension. Inhibition of catecholamine synthesis in the range of 50-80% was achieved with divided daily drug dosage of from 1.0 to 4.0 g. Striking clinical benefit was noted in patients with pheochromocytoma in whom the drug was used in preparation for surgery and during chronic medical management. The drug appeared to have limited usefulness when used in essential hypertension, unless added to existing therapy with conventional agents. No beneficial effects were noted in thyrotoxicosis, glaucoma, and Raynaud's phenomenon. Untoward effects in order of decreasing incidence were: sedation (with insomnia on withdrawal), anxiety, tremor, diarrhea, and galactorrhea. Drug crystalluria, which has been observed in animals and is currently restrictive of clinical trials, was not observed in these studies. Evidence is presented that the minor conversion of alpha-MPT to methyldopa probably does not contribute significantly to the central and peripheral effects of the drug.
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PMID:Biochemical and pharmacologic effects of alpha-methyltyrosine in man. 563 45

Metoclopramide antagonizes the effect of dopamine in the central nervous system and other organ systems. Metoclopramide's effect on the medullary chemoreceptor trigger zone makes it useful as a routine anti-emetic and in preventing vomiting induced by antineoplastic drugs, particularly cisplatin. Metoclopramide's gastrointestinal smooth muscle stimulatory effects are related to its ability to antagonize the inhibitory neurotransmitter, dopamine; to augment acetylcholine release and sensitize the muscarinic receptors of the gastrointestinal smooth muscle; and to coordinate gastric-pyloric-small intestinal motor function. The indications for which metoclopramide is approved in the United States are reviewed. Adverse effects, which may occur in up to 20% of patients, include drowsiness, lassitude, and akathisia; all are usually mild, transient, and reversible. Tremor, dystonic reactions, and extrapyramidal effects are infrequent; breast enlargement, galactorrhea, and menstrual irregularities are related to prolactin release.
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PMID:Metoclopramide: pharmacology and clinical application. 633 44

The authors report results attained by means of a replaced benzamide, thiapride, in the treatment of 21 subjects showing involuntary movements of extra-pyramidal origin and more exactly: extra-pyramidal syndromes due to drugs (3), idiopathic dyscinesias (8), choreas (6), dystonias (3), essential tremor (1). The drug was administered per os as well as per IM and EV. Results were good or fair in 71% of cases. The clearest improvements were obtained in iatrogenic dyscinesias (torticollis, diaphragm clonisms). The drug was well tolerated in all cases, both from the clinical and hematochemical standpoint, even at the highest dosages, and, in particular, no case of amenorrhea or galactorrhea was pointed out. Finally, the authors explain how the best results with thiapride may probably be obtained in those forms in which an hyperfunction of the dopaminergic system is proved, thanks to the competitive action of the molecule on presynaptic dopaminergic receptors.
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PMID:[Treatment of abnormal movements of extrapyramidal origin with tiapride]. 725 7