Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0012833 (dizziness)
 9,689 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Fourteen patients with advanced ovarian cancer received a 72 hour infusion of a new DNA intercalator, crisnatol mesylate, administered intravenously. There was no evidence of antitumor efficacy. A syndrome of nausea and vomiting associated with vertigo, dizziness and ataxia was observed in nearly all patients. Two of the patients developed severe CNS toxicity manifested in one by a grand-mal seizure and in the other by peripheral neuropathy. Further explorations into the potential efficacy of crisnatol mesylate administered intraperitoneally are underway.
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PMID:A phase II study of crisnatol mesylate in patients with ovarian carcinoma. 150 Feb 64

Chronic renal failure is almost invariably accompanied by symptomatic anemia. It has been demonstrated that the primary cause of this anemia is inadequate production of erythropoietin by the diseased kidneys. The isolation of erythropoietin, followed by the cloning and expression of the human erythropoietin gene, made possible clinical trials of rHuEPO in uremic patients. rHuEPO produced dramatic increases in the hematocrit in almost all patients treated and also ameliorated many symptoms, such as lethargy, dizziness, and poor appetite, that had long been attributed to the effect of uremic toxins. Adverse effects of treatment with rHuEPO noted in the early clinical trials included hypertension, seizures, arteriovenous fistula or shunt thrombosis, and hyperkalemia. Further study of rHuEPO has shown that many of these side effects may be no more frequent in patients receiving rHuEPO than in other uremic patients not receiving rHuEPO. Reduction of the rHuEPO dosage and subcutaneous administration produce less rapid increases in the hematocrit and may lessen the incidence and severity of these side effects. rHuEPO therapy places great demands on both the body's iron stores and the capacity to rapidly transfer iron from storage sites to the erythroid progenitor cells. Thus, almost all patients treated with rHuEPO become iron deficient and require oral or parenteral iron replacement. Response to rHuEPO in uremic patients is diminished if the anemia is complicated by iron deficiency, inflammatory disorders, aluminum overload, or deficiency of folate or vitamin B12. rHuEPO therapy is safe and effective in the treatment of the anemia of chronic renal failure. The use of rHuEPO leads to enhanced quality of life and eliminates the need for red cell transfusions. In addition to hemodialysis patients, predialysis patients and those on CAPD benefit from and are candidates for rHuEPO therapy.
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PMID:Anemia of renal failure. Use of erythropoietin. 157 66

A 59-year-old female was hospitalized because of disturbance of consciousness and convulsive seizures. She had taken a hormonal drug for 15 months after breast cancer surgery. A computed tomography scan revealed multiple high-density areas in the left temporal and frontal and the right parietal lobes. Angiography showed a dural arteriovenous malformation (AVM) in the posterior fossa fed by the occipital and the middle meningeal arteries and draining into the transverse sinus. It also demonstrated occlusion of the left sigmoid sinus in the venous phase. She complained of headache in the occipital region and dizziness. On day 13, the left occipital artery was ligated and cut, and then abnormal arterial anastomoses around the lesion were coagulated. After surgery, clinical symptoms disappeared. The etiology of dural AVM is controversial, but in this case it is suspected that sinus thrombosis due to the drug caused the dural AVM. The authors discuss the etiology and treatment of dural AVM in the posterior fossa.
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PMID:[Dural arteriovenous malformation in the posterior fossa presenting with multiple intracerebral hematomas. Case report]. 170 75

ADD 94057, a metabolite of fluzinamide, manufactured by the A. H. Robins Company, blocks chemically- and electrically-induced seizures in animals. The primary objective of this open add-on study was to evaluate patient tolerability of ADD 94057 at ascending target plasma concentrations. Nine subjects with medically refractory seizures were receiving phenytoin (PHT, 3), carbamazepine (CBZ, 3), or both (3). A pharmacokinetic profile after a single oral 400-mg dose of ADD 94057 was used to calculate ADD 94057 dosages. After a 4-week baseline period, patients were treated for 4 weeks with weekly ADD 94057 dosage escalations. Two patients completed the study at their assigned highest dosage level; the other patients finished the study at lower dosages. The patients receiving PHT (but not CBZ) tolerated higher plasma concentrations of ADD 94057 than did patients receiving CBZ, alone or in combination with PHT. Adverse experiences included headache, ataxia, blurred vision, diplopia, dizziness, lightheadedness, and mild confusion. Eight of nine patients had reductions in seizure frequency from baseline.
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PMID:Pharmacokinetic and dose tolerability study of ADD 94057 in comedicated patients with partial seizures. 173 43

Photosensitivity has proved to be a useful model to study the acute effects of experimental antiepileptic drugs (AEDs). The photosensitivity range is usually diminished or even abolished after administration of a known or experimental AED. An increase in photosensitivity, an unexpected reaction, was found in four photosensitive epileptic patients after oral ingestion of 500, 100, or 50 mg of Org 6370. Moreover, the three patients receiving doses of 100 and 500 mg reported nausea, dizziness, restlessness, and an increase in spontaneous epileptic seizures (myoclonus and in one patient a generalized tonic-clonic convulsion). The side effects coincided with peak Org 6370 serum levels. Our findings indicate that in the photosensitivity model experimental drugs with proven anticonvulsant properties in animals may increase rather than decrease the degree of patient photosensitivity. Photosensitive patients may represent a special subgroup of epileptic patients and therefore need to be classified as such.
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PMID:Preliminary assessment of the efficacy of Org 6370 in photosensitive epileptic patients: paradoxical enhancement of photosensitivity and provocation of myoclonic seizures. 173 47

Admissions of 762 patients for epileptic seizures and 1553 for dizziness were studied for the connection with the level of monthly and yearly solar activity in the 11-year solar cycle and with four levels of daily geomagnetic activity levels (400 epileptic patients and 802 patients suffering with dizziness). The most significant differences of the studied groups were in the male/female ratio in different conditions of solar and geomagnetic activity. Changes in the group of epileptic patients were accompanied by similar, but adverse changes in the group suffering from dizziness. Different conditions of responses of females and males to environmental changes can explain the demonstrated results.
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PMID:Admissions of patients with epileptic seizures (E) and dizziness (D) related to geomagnetic and solar activity levels: differences in female and male patients. 180 61

The side-effect profile of quinolone antibiotics in man includes CNS disturbances such as dizziness, insomnia and convulsions. Although it has been suggested that the proconvulsive liability of quinolones involves an interaction with GABA receptors in the central nervous system, no animal model has been described to evaluate or confirm the mechanism of this effect. The proconvulsive activity of the quinolone antibiotics, nalidixic (NAL) and oxolinic (OXO) acid were tested in male mice following oral doses of 10-100 mg/kg utilizing the convulsive stimuli pentylenetetrazole (PTZ), picrotoxin, strychnine or electroshock. While NAL and OXO did not alter the threshold for convulsions induced by PTZ, strychnine or picrotoxin, both agents lowered the threshold for electroshock-induced seizures. Furthermore, the proconvulsive actions of NAL and OXO were completely blocked by the excitatory amino acid receptor antagonists, MK-801 and 2-amino-4-phosphonobutyric acid (AP-4). These data indicate that the mechanism of convulsive liability of quinolone antibiotics does not involve GABA receptor interactions as previously thought, but appears to involve activation of excitatory amino acid (EAA) receptors, possibly located in the optic region of the central nervous system.
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PMID:The proconvulsive activity of quinolone antibiotics in an animal model. 189 4

Clomipramine is a newly marketed tricyclic antidepressant drug prescribed for obsessive-compulsive disorder (OCD). It selectively blocks neuronal uptake of serotonin. Clomipramine has been prescribed in Europe and Canada for 20 years in management of depression. Studies have now shown clomipramine to be effective in treating OCD. Dry mouth, visual disturbances, constipation, sexual dysfunction, somnolence, tremors, and dizziness are among the commonly reported side effects. Like other tricyclics, clomipramine exhibits a potential for cardiotoxicity, especially by impairing conduction and/or orthostasis. It also has the effect of lowering seizure threshold. Overdose risk is considerable. Careful medical supervision and adherence to prescribing guidelines are presumed to reduce medication risk factors. The outstanding benefit of this drug is its proved efficacy in the management of obsessive-compulsive disorder, as the first pharmacotherapy approved for this previously rather treatment-resistant condition.
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PMID:Clomipramine for obsessive-compulsive disorder: prescribing guidelines. 192 26

While the cause of Parkinson's disease (PD) remains unknown, recent evidence suggests that certain external factors, ie, environmental agents, may act as neurotoxins, initiating the chain of oxidative reactions that ultimately destroy neurons in the substantia nigra. Young-onset PD might result from greater exposure to a putative neurotoxin. This hypothesis has rekindled interest in the epidemiology of PD. We therefore conducted a detailed analysis of various environmental exposures and early life experiences in 80 patients with old-onset PD (at an age older than 60 years), 69 young-onset patients (younger than 40 years), and 149 age- and sex-matched control subjects. Contrary to previous reports, we were unable to implicate well water or exposure to herbicides, pesticides, or industrial toxins as significant PD risk factors. A residential history of rural living was reported by more patient cases than control subjects and was marginally significant. On the other hand, at least one episode of head trauma "severe enough to cause vertigo, dizziness, blurred or double vision, seizures or convulsions, transient memory loss, personality changes, or paralysis" occurred significantly more often prior to disease onset in patients with both young-onset and old-onset PD than in control subjects (odds ratio = 2.7). When adjusted for head trauma and rural living, smoking was inversely associated with PD, as has been previously reported (odds ratio = 0.5). There were no significant differences in early life experiences or environmental exposures between young-onset and old-onset patients. We suggest that the risk of developing PD is influenced by a variety of factors.(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:The epidemiology of Parkinson's disease. A case-control study of young-onset and old-onset patients. 195 12

During 1988, an endemic outbreak of aseptic meningitis was noted in the Kaohsiung area. Throughout the year, a total of 89 cases were identified by cerebrospinal fluid (CSF) examination at the Pediatric Department of Kaohsiung Medical College. The peak incidence was from June to October. Scattered cases still occurred during November and December. The male to female ratio was 1.7:1 and the age distribution ranged from 1 month to 15 years old. Two peaks of age distribution were observed; one in infancy and the other in the 4-7 year old age group. Most of them exhibited fever (94.4%), headache (68.9%), and vomiting (68.5%). Other associated symptoms and signs included neck stiffness, sore throat, cough, Brudzinski's sign, abdominal pain, seizure, dizziness, rhinorrhea, diarrhea, Kernig's sign, skin rash, hyperemic conjunctiva, apnea, and oral ulcers. Most of them had CSF white blood cell (WBC) counts less than 1000/mm3, normal or mild elevated protein, and normal CSF/plasma sugar ratio. Three patients were found to have a virus in their CSF without pleocytosis. Virus isolations from CSF throat swabs and/or rectal swabs were performed in 65 patients, half of them (35/65, 53.8%) had positive results including echovirus type 9 (sixteen), echovirus type 30 (eighteen), and adenovirus type 3 (one). Echovirus type 9 was predominant during July and August whereas echovirus type 30 became predominant after September. All patients recovered spontaneously without any sequelae.
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PMID:Clinical observations and virological study of aseptic meningitis in the Kaohsiung area. 198 74


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