Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0002874 (aplastic anemia)
 5,905 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Most of the side effects associated with carbamazepine (Tegretol, USP, Geigy Pharmaceuticals) therapy are mild, transient, and reversible with an adjustment in dosage or rate of dosage increase. Direct reports to Geigy Pharmaceuticals for the period 1975 to 1986 totaled 371 hematologic, 396 dermatologic, and 156 hepatic and pancreatic occurrences out of more than 4 million patients treated. These include 27 cases of aplastic anemia and 10 of agranulocytosis. In a study of the incidence of side effects in 220 children below the age of 16 years who were receiving carbamazepine, drowsiness, loss of coordination, and vertigo were the most commonly observed side effects and were almost always transient and dose related. The findings of this study are comparable with those of other series assessing carbamazepine-associated adverse reactions in children and adults. Overall, 30 to 50% of children and adults were reportedly free of side effects in these studies. Recommendations for carbamazepine therapy include education of patients and parents in the nature and likelihood of possible serious adverse reactions and routine monitoring to detect laboratory abnormalities.
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PMID:Carbamazepine side effects in children and adults. 296 58

Our data show that 1% of patients who required hospital treatment did so due to severe adverse reactions to analgesics. The most frequent adverse reaction was major gastrointestinal bleeding after aspirin, indomethacin, phenylbutazone or naproxen. Thrombocytopenia, second in frequency, was also mainly a complication of aspirin treatment, as was severe vertigo and tinnitus. Allergic reactions and leucopenia or agranulocytosis occurring in single cases only were associated with the use of pyrazolones. Patients with nephropathy were usually taking phenacetin or one of the close derivatives paracetamol or bucetin. Intensive monitoring for adverse reactions to drugs in 6,000 hospitalised patients in medical wards showed that analgesics, although frequently used, did not lead to life-threatening reactions. Gastrointestinal and neurological side effects were the most commonly observed reactions and these occurred more often after aspirin, indomethacin or pentazocine than after dipyrone or tilidine. Preliminary data of an international case-control-study on agranulocytosis and aplastic anaemia suggest that the incidence of agranulocytosis was in the order of 2 to 3 per million users of analgesics per year. Agranulocytosis occurred predominantly with pyrazolones, with a mortality of 1 to 2 per 10 million users per year. A cohort study on the treatment of colic pain in general practice showed that serious events most likely due to adverse reactions to analgesics were bronchospasm, shock fragments or shock. The incidence of these serious events was about 2 in 1,000 treated cases. The relative risk was not increased by treatment with pyrazolones, opioids or other drugs.
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PMID:Rare but serious risks associated with non-narcotic analgesics: clinical experience. 382 33

Twenty-four patients, including two with aplastic anemia and 22 with malignancy, underwent marrow transplantation after preparation with mechlorethamine, 0.3 to 2.0 mg/kg body weight. Fourteen of the 21 neurologically evaluable recipients developed immediate neurotoxicity a median of 4 days after treatment (range, 0 to 34 days). Confusion and disorientation were observed in six patients, headache in six, hallucinations n four, lethargy in four, tremors in three, paraplegia in one, seizure in one, and vertigo in one. Whereas acute symptoms cleared in 11 patients, three remained symptomatic until death. Twelve evaluable patients survived more than 60 days; all six with previous acute toxicity subsequently developed delayed onset of new neurologic findings (personality change, confusion, seizure, diplopia, or dementia) a median of 169 days (range, 70 to 248 days) after treatment. Cerebrospinal fluid analysis was usually normal but cerebral computed tomographic scans showed ventricular enlargement and electroencephalograms showed diffuse slowing. Postmortem histologic examination of brain showed neuronal degenerative changes with increased vascularity, gliosis, and perivascular fibrosis. Neurotoxicity appeared to increase with age and mechlorethamine dose and was commoner in patients given additional procarbazine or cyclophosphamide.
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PMID:Immediate and delayed neurotoxicity after mechlorethamine preparation for bone marrow transplantation. 704 28

In the present study, the clinical and audiological features of 3 patients with aplastic anemia who subsequently developed sudden sensorineural hearing loss are reported. These patients, for whom a diagnosis of aplastic anemia had previously been confirmed, suddenly developed profound or complete hearing loss accompanied by tinnitus and severe vertigo. In addition to erythrocytopenia and thrombocytopenia, serial hematological examinations revealed a marked drop in the platelet count prior to or just at the time of the acute episode of hearing loss. The prognosis for hearing recovery was poor in each patient. These findings suggest that intracochlear hemorrhage could be a mechanism underlying the sudden sensorineural hearing loss in these patients.
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PMID:Aplastic anemia and sudden sensorineural hearing loss. 807 94

Carbamazepine is a well-established, effective treatment of complex partial seizures and is well tolerated in most patients. The adverse effects of carbamazepine include aplastic anemia, agranulocytosis, pancytopenia, bone marrow depression, thrombocytopenia, cardiac conduction abnormalities, congestive heart failure, and peripheral edema. Hypertension or hypotension has also rarely been documented in patients with either therapeutic or toxic blood levels of carbamazepine. It is possible that carbamazepine-induced hypertension in those with therapeutic blood levels is rarely seen because most of the patients who begin treatment are young and do not have baseline hypertension. The authors describe a patient of African-American descent with a history of controlled essential hypertension who developed severe uncontrolled hypertension when started on carbamazepine. Treatment with additional antihypertensive medications did not reduce his blood pressure. In addition, he developed two episodes of transient neurologic deficits, the symptoms of which consisted of dysarthria, vertigo, and unstable gait. A substantial reduction of his carbamazepine dose resulted in the control of his blood pressure and no recurrence of his symptoms.
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PMID:Transient neurologic deficits associated with carbamazepine-induced hypertension. 1289 34