Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0344307 (analgesia)
 28,200 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

A double-blind study of 229 patients with the use of intravenous diazepam as compared with a placebo to produce sedation during local analgesia showed that significantly improved sedation occurred when diazepam was used. The diazepam was dissolved in cremophor and this reduced the pain of intravenous injection of the diazepam. One patient who received Cremophor only, showed a moderately severe allergic reaction. It is suggested that a small test dose should always be given before giving any drug which is dissolved in Cremophor.
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PMID:Intravenous sedation and regional analgesia. 32 33

In a double-blind control study, oral doses of placebo, propoxyphene napsylate (50 or 100 mg), or codeine sulfate (30 or 60 mg) were administered to 46 postepisiotomy patients, grouped by severity of pain reported at first-dose drug administration. Eight hourly observations by a trained observer provided estimates of analgesia. The analgesia scores for placebo treatments were significantly lower than for the lesser doses of either drug (P less than .05) as well as for the greater doses (P less than .01). At both dose levels, the analgesia scores for both drugs were almost identical. Analgesia with the higher doses was greater than with the lower, but not to a statistically significant extent. The difference in patient responses increased following the second dose. No serious adverse reactions occurred; the elicited and volunteered reports of minor side effects were similar for all five treatments.
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PMID:Codeine and propoxyphene in postepisiotomy pain. A two-dose evaluation. 32 38

A review of experimental studies concerning acupuncture gives a current indication as to the neurophysiological mechanisms of its hypoalgesic effects. In man, these effects are demonstrated by study of the nociceptive flexion reflex. Other methods for the study of pain threshold have revealed a hypoalgesic action in man and in the animal. The authors analyse the pathways and structures necessary to analgesia: peripheral afferent pathway, ascending pathways, suprasegmental controls. The inhibitory mechanisms activated by acupuncture appear to be identical to those involved in analgesia by morphine and by central stimulation.
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PMID:[The action of acupuncture on pain. Physiological basis]. 32 37

After the war of liberation, Mao Tse Tung encouraged an integration of Western and traditional Chinese medicine. Several schools of therapeutic acupuncture have defined different points of puncture, originally assumed to be on an empiric basis but now rationalized as areas where nerve endings congregate. Results of therapeutic acupuncture in China cannog be evaluated because of inadequate record keeping. At the University of Washington Pain Clinic, immediate results (two to three days) are good but never lasting, nor do they decrease concomitant medication. For anesthesia, acupuncture acts to produce only hypalgesia in most patients, although some experience total analgesia. Patient selection and mental preparation are careful. Hence, the method is used in much less than 10% of the operations in China, and in these the analgesia is satisfactory by Western standards in only approximately 30%. Concepts as to the mode of action of acupuncture analgesia range from an attitudinal change towards sensory input to the release of a neurohumoral analgesic substances.
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PMID:Acupuncture analgesia and anesthesia. 32 79

Acetaminophen is an effective mild analgesic and antipyretic agent. In double-blind, controlled experimental pain studies of short duration, acetaminophen is superior to placebo and produces analgesia comparable to that produced by aspirin. The frequency of adverse reactions to therapeutic doses of acetaminophen is low, as is that of aspirin. Overdosage with acetaminophen, however, may result in irreversible hepatotoxicity. Since clinical manifestations of intoxication can be of slow onset, physicians may tend to delay initiation of definitive therapy. Intravenous cysteamine, and possibly oral methionine, appear to be effective in preventing hepatotoxicity if they are administered with 10 h of drug ingestion. Physicians should be aware of the potential danger of acetaminophen overdosage and alerted to its clinical manifestations.
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PMID:Acetaminophen. 32 28

The distribution of Met-enkephalin- and substance P-immunoreactive neurons was studied by indirect immunofluorescence in some areas related to pain and analgesia. Met-enkephalin- and substance P-positive cell bodies and nerve terminals were observed in the periaqueductal central gray, the nucleus raphe magnus, the marginal layers and substantia gelatinosa of the spinal trigeminal nucleus, and the dorsal horn of the spinal cord. Lesion experiments suggest that Met-enkephalin neurons in the dorsal horn and possibly in the spinal trigeminal nucleus are interneurons or propriospinal neurons with nerve terminals in the laminae I and II of the cord and in the superficial layers of the spinal trigeminal nucleus, respectively. These areas are also very rich in substance P-positive nerve terminals, mainly representing central branches of primary afferent neurons. The present immunohistochemical-anatomical findings support the hypothesis that stimulation-produced analgesia is related to activation of spinal and spinal trigeminal enkephalin interneurons forming axo-axonic synapses with (substance P?) pain afferents in the superficial laminae of the dorsal horn and the spinal trigeminal nucleus. These interneurons may be activated by sensory fibers and by descending fibers from medullary stimulation sites. Transmitter substances in these descending fibers may be 5-hydroxytryptamine and substance P.
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PMID:Immunohistochemical analysis of peptide pathways possibly related to pain and analgesia: enkephalin and substance P. 33 26

Dosage estimates of antiinflammatory drugs in human arthritis Phase II trials are difficult to obtain and prolong such trials unnecessarily. Antiinflammatory drugs almost always have analgesic properties in man and good dose estimates for analgesic activity can be obtained. In 140 patients with surgical pain, 300, 600, and 1200 mg of aspirin were compared to 75, 150, and 300 mg of 43-715 (1-isopropyl-4-phenyl-7-methyl-2 (1H) quinazolone), an antiinflammatory quinazolone derivative, for analgesia in a double-blind trial using subjective response methodology. The test drug was shown to be analgesic at a level four times more potent, milligram for milligram, than aspirin, an estimate that should be useful for later definitive Phase II trials in arthritis.
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PMID:Estimates of doses of antiinflammatory drugs in man by testing for analgesic potency. I. 1-isopropyl-4 phenyl-7-methyl-2 (1H) quinazolone versus aspirin. 33 85

A controlled, double-blind study involving 250 women was carried out ot assess the efficacy of oral tilidine 25, 50 and 100 mg in treating postepisiotomy pain, and to offer a comparison with oral pentazocine 50 mg. All the analgesics produced significant pain relief. At peak effect tilidine 50 mg produced very similar results to pentazocine 50 mg with tilidine 25 mg producing less, and tilidine 100 mg more pain relief. These results were not, however, statistically significant. In these postdelivery ambulant patients pentazocine 50 mg and tilidine 100 mg produced at 25% incidence of side-effects, mainly dizziness and drowsiness, but tilidine 25 mg produced significant analgesia with virtually no side-effects.
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PMID:A clinical comparison of tilidine hydrochloride and pentazocine, given orally for the treatment of postoperative pain. 33 71

A quantitative method for measuring pain threshold by the use of ultrasonic stimulation in man was designed and the possibility of clinical application in assessing analgesics was investigated. Ultrasonic stimulus was given to Japanese subjects on the palmer distal part of the 2nd, 3rd and 4th fingers of both hands. The latent time between start of the stimulation and withdrawal of the hand when perceiving pain was considered the pain threshold. The ultrasonic evoked pain was a sharp pin-prick type, without sensations such as thermal and mechanical. The pain threshold lowered with increasing either stimulus intensity or water bath temperature when the hand of the subject was immersed during measurement. Normal threshold to ultrasonic stimulation measured in both 50 men and 50 women gave nearly normal distribution curves; women being more sensitive to ultrasonics than men. Analgesia with codeine phosphate (20 mg p.o.), aspirin (1.5, 1.0, 0.5 g p.o.), aminopyrine (100 mg p.o.) and mefenamic acid (500 mg p.o.) in volunteers of both sexes was demonstrated significantly using this method under double blind circumstances. Pentobarbital, diazepam, butylscopolamine, bromelain and placebo each in the usual dose used clinically failed to alter the pain threshold. Humans were at least 25 fold more sensitive than mice to the analgesics used herein.
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PMID:Clinical assessment of analgesics using ultrasonic stimulation. A new method. 33 41

Previous research implicates an endogenous central pain inhibitory mechanism in opiate analgesia, analgesia produced by focal electrical stimulation of the brain, and acupuncture analgesia. This investigation evaluates the possibility that analgesia produced by hypnosis is also mediated by such a mechanism. Results suggest that hypnotic analgesia is unlikely to involve this central pain inhibitory mechanism since hypnotic analgesia is not altered by naloxone hydrochloride, a specific narcotic antagonist. Results further demonstrate that the hypnotic procedure used produces an unusually effective and reliable increase in pain threshold. This finding generalizes to the control of clinical dental pain, and suggests that hypnotic pain control is a more widespread phenomenon in the population than has been thought.
Pain 1977 Oct
PMID:Evaluation of the efficacy and neural mechanism of a hypnotic analgesia procedure in experimental and clinical dental pain. 33 20


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