• YAKHAK HOEJI
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• v.28 no.1
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• pp.17-20
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• 1984

Synthetic procedures to synthesize fenbufen-acetaminophen ester were searched by acid chloride method, DCC method and mixed acid anhydride method. The compound was synthesized by DCC method and mixed acid anhydride method but could not be synthesized by acid chloride method. Its anti-inflammatory activity was superior to acetaminophen and similar to fenbufen.

• Journal of Pharmaceutical Investigation
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• v.14 no.2
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• pp.55-61
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• 1984

This investigation was designed to determine the release of fenbufen from suppositories and their bioavailability in rabbits. Suppositories containing fenbufen were made by the fusion method with Witepsol H-15, Wecobee and PEG 1540 base. Displacement value, weight variation, content uniformity, melting point and melting time were determined for preformulation of the fenbufen suppositories. The release rates were determined with the KP dissolution apparatus and with cellophane tube dialysis device and were increased in order of PEG 1540, Witespol H-15 and Wecobee. The bioavailabilities of fenbufen after rectal administration were also increased in order of PEG 1540, Witespol H-15 and Wecobee.

• Journal of Pharmaceutical Investigation
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• v.14 no.3
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• pp.136-143
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• 1984

Inclusion complex formation of fenbufen with ${\beta}-cyclodextrin$ in water and in solid state was comfirmed by solubility method, ultra violet absorption, circular dichroism and infra-red spectroscopies, differential thermal analysis, and X-ray diffractometry. A solid complex of fenbufen with ${\beta}-cyclodextrin$ in 1 : 1 molar ratio was prepared by the freeze-drying method, its dissolution characteristics in water and its analgesic and antiinflammatory effect in mouse or rat were examined. The apparent release of fenbufen from the inclusion complex was significantly improved, hut no significant difference in its analgesic and antiinflammatory effect was found.

• Toxicological Research
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• v.8 no.1
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• pp.63-70
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• 1992

The present study was performed to evaluate whether the application of Fenbufen is reasonable for predicting the convulsive liability of the quinolone derivatives and to examine whether pentylenetetrazole (PTZ) can be used as a screening tool for their Central Nervous System (CNS) toxic pontential. The convulsive activity of the quinolones was markedly potentiated by the pretreatment of Fenbufen. In combination with Fenbufen, enoxacin (ENX), norfloxacin (XFLX), and ciprofloxacin (CPFX) provoked convlusions and subsequent death at the intravenous doses of 0.5mg/kg, 10mg/kg, and 40mg/kg, respectively, whereas ofloxacin (OFLX) and pefloxacin (PFLX) did not induce convulsions and death even at a relatively high dose of 100mg/kg iv.

• Bulletin of the Korean Chemical Society
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• v.32 no.1
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• pp.341-343
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• 2011

• Journal of Pharmaceutical Investigation
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• v.13 no.4
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• pp.191-195
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• 1983

Acetaminophen, fenbufen, and mefenamic acid tablets were formulated with the same additives, granulated to different sizes, ranging $30{\sim}200mesh$, and compressed by pressure of $0.5{\sim}2.0\;ton{\cdot}cm^{-2}$. The hardness and disintegration time of the three tablets were determined. The dissolution rates of the three tablets at critical point of pressure were investigated. The results showed that fenbufen, and mefenamic acid tablet had critical compression pressure of $1.0\;ton{\cdot}cm^{-2}$, but acetaminophen tablet had that of $1.5\;ton{\cdot}cm^{-2}$. Neverthless, three tablets were disintegrated within 5 min. Among the three tablets, mefenamic acid tablet followed zero order of dissolution and the rate constants were as fellows; $1.68 \;mg{\cdot}min^{-1}\;(30{\sim}50mesh),\;1.76mg{\cdot} min^{-1}\;(50{\sim}80\;mesh)\;and\;4.85\;mg{\cdot}min^{-1}\;(80{\sim}200mesh)$.

• Archives of Pharmacal Research
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• v.11 no.2
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• pp.127-133
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• 1988

The crystal structure of fenbufen was determined by X-ray diffraction techniuques. The compound was recrystallized in orthorhombic crystal system, space group $Pca2_1$ a = 31. 918(10), b = 5.550 (2), c = 15.078 (9) ${\AA}, D_m$= $1.26, {\D_x$= 1.264 g/$\textrm{cm}^3$, and Z = 8. The structure was solved by direct methods and refined by least squares procedure to the final R value of 0.051 for 1780 independent reflections. Two molecules in the asymmetric unit are related by a pseudo center of symmetry and dimerized via O-H...O hydrogen bonds. The carbonyl group attached to the phenyl ring is nearly coplanar to the ring. In the crystal the molecules are arranged in paralle stacks in the a direction.

• YAKHAK HOEJI
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• v.25 no.1
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• pp.9-14
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• 1981

Anti-infammatory, analgesic and ulcerogenic activities of fentiazac were investigated in comparison with those of acetylsalicylic acid, fenbufen, naproxen and phenylbutazone. On the anti-inflammatory activity in carrageenin-induced rat paw edema and the analgesic activity on writhing syndrome induced with acetic acid in mice, fentiazac displayed more potent effect than acetylsalicylic acid, fenbufen and pbenylbutazone. But the ulcerogenic action of fentiazac on gastrointestinal tract in fasting rats was less than that of reference drugs. From these investigation, fentiazac seemed to indicate a poor correlation between the extent of anti-inflammatory activity and ulcerogenic action.

• YAKHAK HOEJI
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• v.38 no.5
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• pp.586-594
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• 1994

The general pharmacological effects of DWQ-013, a new synthetic quinolone antibacterial agent, were examined on the central nervous system in experimentral animals and the following results were obtained. Drug interaction of DWQ-013 with theophylline, fenbufen and nonsteroidal antiinflammatory drugs was also examined. DWQ-013 decreased touch escape effect on the general behavior and decreased body temperature at a concentration of 1000 mg/kg in mice. But DWQ 013 had no effect on the locomotor activity, rotarod perfomance and traction test in mice. Furthermore, DWQ-013 increased pentobarbital-induced sleeping time and affected the onset time in acetic acid-induced writhing test in mice. DWQ-013 reduced onset time and death time on strychnine-induced convulsions and death time on pentylenetetrazole-induced convulsions at a concentration of 1000 mg/kg in mice. But, the drug had no effect on the electroshock. DWQ-013 did not interact with fenbufen and any other NSAIDs but it did interact with theophylline. From these results, it could be suggested that DWQ-013 had less pharmacological effect than other quinolones on the central nervous system.

• Toxicological Research
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• v.8 no.2
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• pp.161-170
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• 1992

The objectives of this sutdy were to investigate the effects of 8-fluorociprofloxacin(8-FCP) on the central nervous system (CNS) and to compare with those of ciprofloxacin(CP). The $LD_{50}$ values of intravenous 8-FCP were similar or slightly lower in rat (M;203.6mg/kg, F;186.1mg/kg)and markedly lower in mice (M;126.5mg/kg, F;163.1mg/kg), as compared to those of CP. However, no recognizable differences in the clinical signs and recovery were found between 8-FCP and CP in both species. In combination with fenbufen, the convulsive liability of 8-FCP was higher than that of CP. At an intravenous dose of 10mg/kg, 8-FCP provoked convulsive signs and subsequent death in mice, whereas CP produced convulsion at a dose of 40mg/kg. The hexobabital -induced sleeping time was markedly lengthened by the oral administration of 8-FCP, but slightly increased by CP. In addition, the two quinolone derivatives had analgesic effects. The analgesic activity of 8-FCP was approximately two times higher than that at CP. However, both 8-FCP and CP had little effects of pentylenetetrazole-or strychnine-induced convulsion and muscle relaxation. Our finding that 8-FCP had more remarkable CNS effects than CP strongly suggests that there should be differences in the pharmacokinetic characteristics and/or in the binding affinity for specific biologic targets, or receptors, in the CNS.