Search results for "analgesics"
showing 10 items of 260 documents
Rapid switching from morphine to methadone in cancer patients with poor response to morphine
1999
PURPOSE: The aim of this study was to evidence the clinical effects of an abrupt substitution of morphine with methadone using a fixed ratio of 1:5 in patients for whom limiting adverse effects occurred before adequate analgesia was achieved with oral morphine. PATIENTS AND METHODS: A cross-sectional prospective study was carried out on 24 consecutive patients who were switched from oral morphine to oral methadone because they experienced substantial adverse effects that limited further increase in morphine dose. A fixed conversion morphine-to-methadone ratio of 5:1 was chosen. Subsequently, doses were changed according to clinical need, with frequent visits or phone contacts. Pain and sym…
Interaction of morphine and haloperidol on agonistic and motor behaviors of male mice.
1997
To further clarify the interaction between opioid and dopaminergic systems, the effects of simultaneous administration of morphine hydrochloride (1.25 or 2.5 mg/kg) and haloperidol (0.1 mg/kg) on aggressive behavior of male mice were explored. Isolated male mice (experimental animals) were confronted in a neutral area with anosmic, group-housed consepecifics (standard opponents) 30 min after injection of both compounds, and aggression was evaluated by estimation of times allocated to 11 different behavioral categories. In the first experiment (which functioned as a pilot study), the two doses of morphine were explored. In the second one, incorporating a more complete experimental design, on…
Analgesic and thermic effects, and cerebrospinal fluid and plasma pharmacokinetics, of intracerebroventricularly administered morphine in normal and …
1998
Abstract The relationship between asthma and opioids has barely been investigated. This study examines whether active sensitization of rats changes the analgesic and thermic effects of intracerebroventricular morphine or the pharmacokinetics of the drug. Morphine (5, 10 and 20 μg) was given intracerebroventricularly to sensitized (active immunization to ovalbumin and Al(OH)3 then airway challenge with ovalbumin after 12 days) and normal (i.e. non-sensitized) male Sprague-Dawley rats. The tail-flick latencies and changes in colon temperature were determined before morphine injection and at 30 min intervals for a period of 300 min afterwards. Results were expressed as the area under the time-…
Sustained-release oral morphine versus transdermal fentanyl and oral methadone in cancer pain management.
2008
The aim of this study was to compare the analgesic and adverse effects, doses, as well as cost of opioid drugs, supportive drug therapy and other analgesic drugs in patients treated with oral sustained-release morphine, transdermal fentanyl, and oral methadone.One hundred and eight cancer patients, no longer responsive to opioids for moderate pain, were selected to randomly receive initial daily doses of 60 mg of oral sustained-release morphine, 15 mg of oral methadone, or 0.6 mg (25 microg/h) of transdermal fentanyl. Oral morphine was used as breakthrough pain medication during opioid titration. Opioid doses, pain intensity, adverse effects, symptomatic drugs, were recorded at week interva…
Effectiveness of Duloxetine Compared With Pregabalin and Gabapentin in Diabetic Peripheral Neuropathic Pain
2013
This study aimed to compare the effectiveness of duloxetine (DLX) and the anticonvulsants pregabalin (PGB) and gabapentin (GBP) for the treatment of diabetic peripheral neuropathic pain (DPNP) in routine clinical care.Data from a 6-month, noninterventional study involving 2575 patients in whom treatment of DPNP was initiated with or changed to DLX, PGB, or GBP (n=1523) were analyzed post hoc; patients treated with other medications or combinations were excluded from this analysis. Propensity scoring was used to compare patient groups, assessing Brief Pain Inventory (BPI), Clinical and Patient Global Impression (CGI/PGI), the Hospital Anxiety and Depression Scale (HADS), the Sheehan Disabili…
Hyperalgesia: An Emerging Iatrogenic Syndrome
2003
Clinical reports suggest that opioids, intended to abolish pain, can unexpectedly produce hyperalgesia. This paradoxical effect may be mechanistically related to tolerance induced by increasing doses of opioids. Two case reports illustrate a syndrome characterized by increasing pain pursued by escalating opioid doses, which results in a worsening of the clinical picture. Several experimental data may help explain the course of this challenging clinical condition. In escalating opioid doses rapidly, a risk of opioid-induced hyperalgesia should be recognized, as higher doses of opioids may stimulate rather than inhibit the central nervous system by different mechanisms. Alternative procedures…
The palliative-supportive care unit in a comprehensive cancer center as crossroad for patients' oncological pathway
2016
Aim The aim of this study was to assess how an admission to an acute palliative-supportive care unit (APSCU), may influence the therapeutic trajectory of advanced cancer patients. Methods A consecutive sample of advanced cancer patients admitted to APCU was assessed. The following parameters were collected: patients demographics, including age, gender, primary diagnosis, marital status, and educational level, performance status and reasons for and kind of admission, data about care-givers, recent anticancer treatments, being on/off treatment or uncertain, the previous care setting, who proposed the admission to APSCU. Physical and psychological symptoms were evaluated at admission and at ti…
Comparative pharmacological activity of optical isomers of phenibut
2007
Phenibut (3-phenyl-4-aminobutyric acid) is a GABA (gamma-aminobutyric acid)-mimetic psychotropic drug which is clinically used in its racemic form. The aim of the present study was to compare the effects of racemic phenibut and its optical isomers in pharmacological tests and GABAB receptor binding studies. In pharmacological tests of locomotor activity, antidepressant and pain effects, S-phenibut was inactive in doses up to 500 mg/kg. In contrast, R-phenibut turned out to be two times more potent than racemic phenibut in most of the tests. In the forced swimming test, at a dose of 100 mg/kg only R-phenibut significantly decreased immobility time. Both R-phenibut and racemic phenibut showed…
Dexketoprofen/tramadol: randomised double-blind trial and confirmation of empirical theory of combination analgesics in acute pain
2015
Background Combination analgesics are effective in acute pain, and a theoretical framework predicts efficacy for combinations. The combination of dexketoprofen and tramadol is untested, but predicted to be highly effective. Methods This was a randomised, double-blind, double-dummy, parallel-group, placebo-controlled, single-dose trial in patients with moderate or severe pain following third molar extraction. There were ten treatment arms, including dexketoprofen trometamol (12.5 mg and 25 mg) and tramadol hydrochloride (37.5 mg and 75 mg), given as four different fixed combinations and single components, with ibuprofen 400 mg as active control as well as a placebo control. The study objecti…
Synthesis and pharmacological study of ethyl 1-methyl-5-(substituted 3,4-dihydro-4-oxoquinazolin-3-yl)-1H-pyrazole-4-acetates
2001
Several new ethyl 1-methyl-5-(substituted 3,4-dihydro-4-oxoquinazolin-3-yl)-1H-pyrazole-4-acetates 2, substituted at 2 and, alternatively at, 6, 7 or 8 positions of the quinazolinone nucleus, were synthesised. The compounds were screened for their analgesic and antiinflammatory activities, acute toxicity and ulcerogenic effect. Substitution in the benzene moiety of the quinazolinone ring did not show any advantage for the analgesic activity, whereas it improved in some cases the antiinflammatory activity. Some compounds showed appreciable antiinflammatory activity and, at the same time, very low ulcerogenic index.