• 제목/요약/키워드: skin permeation rate

검색결과 84건 처리시간 0.022초

In vitro 경피흡수 실험시 Donor와 Receptor용액중의 글리세린과 PEG 400이 약물의 경피투과도에 미치는 영향 (Effects of Glycerin and PEG 400 in Donor and Receptor Solutions upon Skin Permeation of Drug)

  • 조애리
    • Journal of Pharmaceutical Investigation
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    • 제26권2호
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    • pp.99-103
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    • 1996
  • Effects of glycerin and PEG 400 in donor and receptor solutions upon skin permeation of drug were investigated. Deoxycortisone was used as a model compound. In vitro skin permeation study with freshly excised hairless mouse skin was performed and the steady-state skin permeation rates of the drug were determined in different fractions of glycerin or PEG 400 in donor and receptor solutions. Glycerin in donor solution didn't show any effect on the skin permeation rate of deoxycortisone. However glycerin in receptor solution showed significant effect on the skin permeation rate of the drug. In glycerin, there's a critical concentration for balancing hydration and dehydration of skin. At low concentration, less than 20 %, glycerin showed the enhancement of the flux due to the hydration effect of skin. At high concentration, more than 30 %, glycerin retard the permeation rate which might be due to the dehydration effect on the dermis layer. Since dermis has more water content than the stratum corneum, the steady state skin permeation rates were more influenced when glycerin was in receptor solution than that of in donor solution. PEG 400 aqueous solutions doesn't affect the steady state permeation rate of deoxycortisone significantly.

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항에이즈 약물의 경피흡수에 미치는 합성고분자 멤브레인의 영향 (The Effect of Synthetic Polymer Membranes on the Skin Permeation of Anti-AIDS Drugs)

  • 이경진;김대덕
    • Journal of Pharmaceutical Investigation
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    • 제28권1호
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    • pp.1-5
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    • 1998
  • The effect of synthetic polymer membranes on the permeation rate of dideoxynucleoside-type anti-HIV drugs through hairless rat skin was studied using ethylene/vinyl acetate copolymer (EVA) and ethylene/methyl acrylate copolymer (EMA) membranes fabricated by solvent casting method. In vitro skin permeation kinetics study of DDC (2',3'-dideoxythymidine), DDI (2',3'-dideoxyinosine) and AZT (3'-azido-3'-deoxythymidine) across the (membrane/skin) composite was conducted for 24 hours at $37^{\circ}C$ using the Valia-Chien skin permeation system. The results showed that skin permeation rate of each drug across the (skin/membrane) composite was mainly dependent on the property of the membrane. Proper selection of the polymeric membrane which resembles hydrophilicity/lipophilicity of the delivering drug was important in controlling the skin permeation rate.

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Gum류의 연고제제와 흡수촉진제가 Riboflavin의 경피흡수에 미치는 영향 (Transdermal Permeation of Riboflavin in Ointment Bases Using Gums & Enhancers)

  • 오세영;황성규;김판기
    • 한국환경보건학회지
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    • 제26권2호
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    • pp.91-96
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    • 2000
  • We investigated characters of transdermal therapeutic system(TTS) and the skin permeability of that with applying drug delivery system(DDS). Natural gums were selected as material of TTS. The permeation of natural gums ointment containing drug in rat skin using diffusion cell model. Permeation properties of materials were investigated for water soluble drug such as riboflavin in vitro. We used glycerin, PEG 600 and oleic acid as enhancers. Since dermis has more hydration than the stratum corneum, skin permeation rate at steady state was highly influenced when glycerin was used in riboflavin. The permeation rate of content enhancer and drug was found to be faster than that of content riboflavin only. These results showed that skin permeation rate of drug across the composite was mainly dependent on the property of ointment base and drug. All the gum ointment tested showed good safety. Proper selection of the materials which resemble and enhance properties of the delivering drug was found to be important in controlling the skin permeation rate.

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질산술코나졸겔의 제조 및 약물방출에 관한 연구 (Study on Preparation and Drug Release of Sulconazole Nitrate Gels)

  • 현종목;김경국;지웅길
    • Journal of Pharmaceutical Investigation
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    • 제26권4호
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    • pp.263-271
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    • 1996
  • Sulconazole nitrate(SCN), an imidazole derivative which has been effective in the treatment of dermatophytosis, tinea versicolor and candidiasis, was formulated as a gel containing drug, poloxamer 407, ethanol and propylene glycol. The resulting SCN gels were evaluated with respect to their viscosity, drug release rate, skin permeation rate. The apparent viscosity of SCN gel increased in proportion to poloxamer 407, drug and propylene glycol concentration. In case ethanol was added, the apparent viscosity decreased. The drug release rate of SCN gel increased in proportion to temperature and ethanol concentration. But the drug release rate decreased as the concentration of poloxamer 407 increased. The increase of drug concentration induced nonlinear increase of drug release rate. When propylene glycol was added at the level of 10%, the drug release rate increased but from 15% it decreased. The skin permeation rate decreased in high concentration of poloxamer 407. The skin permeation rate of SCN gel containing 15% ethanol increased about twice than that of gel without ethanol. The increase of drug concentration induced nonlinear increase of skin permeation rate. When propylene glycol was added at the level of 10%, the skin permeation rate increased but from 15% it decreased.

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Transdermal Delivery of Ethinylestradiol UsingEthylene-vinyl Acetate Membrane

  • Shin, Sang-Chul;Byun, Soo-Young
    • Journal of Pharmaceutical Investigation
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    • 제25권3호spc1호
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    • pp.53-59
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    • 1995
  • Ethinylestradiol (EE)-containing matrix was fabricated with ethylene-vinyl acetate(EVA) copolymer to control the release of the drug, Effect of addition of PEG 400 as receptor solution, the stripping of skin and Azone pretreatment on skin on the permeation of EE through the excised mouse skin was also studied. The permeation rate of EE through the excised mouse skin was affected by the PEG 400 volume fraction. The Azone pretreatment on skin didn't affect on the steady state flux, however, the lag time was shortened. The permeation rate of EE through the stripped skin was much larger than that through the whole skin. It showed that the stratum corneum acts as a barrier of skin permeation. The fact that there is little difference in EE permeation between the intact skin and the stripped skin with EVA membrane shows the permeation of EE through the mouse skin is mainly controlled by the membrane.

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겔제제로부터 인도메타신의 피부투과 (Skin Permeation of Indomethacin from Gels)

  • 감성훈;박은석;지상철
    • Journal of Pharmaceutical Investigation
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    • 제25권2호
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    • pp.129-136
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    • 1995
  • In order to reduce the systemic side effects and the gastrointestinal irritation of indomethacin following its oral administration, the drug was formulated as a transdermal gel using poloxamer 407. In vitro diffusion cells fitted with excised rat skins were used to evaluate the effects of formulation variables on skin permeation of indomethacin from poloxamer gels. The formulation variables were the concentrations of indomethacin, poloxamer 407 and ethanol, and the gel pH. The increase of the drug amount in the gel from 0.5% to 2.0% induced a direct but nonlinear increase in the skin permeation rate of indomethacin. The increase of poloxamer concentration from 17.5% to 25% in the gel resulted in a decrease of skin permeation rate of indomethacin, which was due to a reduction in the amount of free drug molecules available for permeation through skin by entrapping more drug molecules within the micelles formed by poloxamer. The increase of ethanol concentration from 10% to 20% in the gel resulted in a linear increase of permeation rate of indomethacin through skin, possibly due to the penetration enhancing effect of ethanol. The skin permeation of indomethacin was substantially influenced by the gel pH, exhibiting a maximum at pH 4.

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Nicotinic acid N-oxide를 이용한 항콜레스테롤 연고의 경피 투과 특성 (Transdermal Permeation Characteristics of Anti Cholesterol Ointment using Nicotinic acid N-oxide)

  • 정덕채;김규원
    • 한국응용과학기술학회지
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    • 제25권2호
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    • pp.123-129
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    • 2008
  • Transdermal therapeutic system(TTS) is often used as the method of drug dosage into the epidermic skin. Natural polymer were selected as ointment material of TTS. We investigated the permeation of natural polymer ointment containing drug in rat skin using horizontal membrane cell model. Permeation properties of materials were investigated for water-soluble drug such as Nicotinic acid N-oxide in vitro. These results showed that skin permeation rate of drug across the composite was mainly dependent on the property of ointment base and drug. Proper selection of the polymeric materials which resemble and enhance properties of the delivering drug was found to be important in controlling the skin permeation rate. This result suggests a possible use of natural polymer ointment base as TTS of antihyperlipoproteinemic agent.

스코폴라민의 흰쥐 피부투과에 대한 투과촉진제들의 영향 (Effect of Various Enhancers on Permeation of Scopolamine through Excised Rat Skin)

  • 정재영;감성훈;김건남;지상철;박은석
    • Journal of Pharmaceutical Investigation
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    • 제33권2호
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    • pp.141-144
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    • 2003
  • The transdermal therapeutic system (TTS) of scopolamine has various advantages over its oral dosage forms. The ideal scopolamine TTS requires high skin permeation rate in short time after it is applied on the skin. In order to increase the initial skin permeation rate of scopolamine from TTS, various permeation enhancers were employed. Enhancers employed were fatty acids (oleic and linolenic acids), cyclic monoterpenes (menthol, camphor, cineole and limonene) and others (isopropyl myristate, sodium lauryl sulfate and glyceryl monostearate). The concentration of enhancers in the base were fixed to 5% (w/w). While fatty acids had little enhancing effect on the skin permeation of scopolamine, cyclic monoterpenes, isopropyl myristate and sodium lauryl sulfate resulted in $1.5{\sim}2.6-fold$ higher skin permeation rate of the drug compared to the control. However, lag time was not affected by enhancers studied.

In vitro에서 키토산 연고의 비타민 $B_{2}$ 방출 특성 (Release Characteristics to Vitamin $B_{2}$ of Chitosan Ointments In vitro)

  • 오세영;황성규;황용현
    • 한국응용과학기술학회지
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    • 제17권1호
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    • pp.43-48
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    • 2000
  • Drug delivery system(DDS) applied to various fields, such as medicine, cosmetics, agriculture and necessities of life. Among these application fields, DDS is often used as the method of drug dosage into the epidermic skin. We investigated characters of transdermal therapeutic system(TTS) and the skin permeability of that with applying DDS. Chitosan was selected as material of TTS. We investigated the permeation of chitosan ointment containing drug in rat skin using horizontal membrane cell model. Permeation properties of materials were investigated for water-soluble drug such as riboflavin in vitro. We used glycerin, PEG 600 and oleic acid as enhancers. Since dermis has more content water(hydration) than the stratum corneum, skin permeation rate at steady state was highly influenced when glycerin was used in water-soluble drug. The permeation rate of content enhancer and drug was found to be faster than that of content water-soluble drug only. These results showed that skin permeation rate of drug across the composite was manly dependent on the property of ointment base and drug. Proper selection of the polymeric materials which resemble and enhance properties of the delivering drug was found to be important in controlling the skin permeation rate.

디클로페낙 프로드럭들의 흰쥐 피부 투과 (Rat Skin Permeation of Diclofenac and its Prodrugs)

  • 도희정;조원제;용철순;이치호;김대덕
    • Journal of Pharmaceutical Investigation
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    • 제31권2호
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    • pp.95-100
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    • 2001
  • Various alkyl ester prodrugs of diclofenac were synthesized in order to investigate the relationship between their skin permeation characteristics and physicochemical properties. Solubility in various vehicles was measured at room temperature. 1-Octanol/water partition coefficients (Log P) and capacity factors (k') were measured to determine the lipophilicity of the prodrugs. Stability of prodrugs in the skin extract and homogenate was also investigated before conducting the skin permeation studies. Increases in the Log P and capacity factor values were observed when alkyl esters of diclofenac were prepared. Since the aqueous solubility of the prodrugs was not high enough, they were saturated in propylene glycol (PG) for skin permeation studies. Prodrugs were rapidly metabolized to diclofenac, both in skin homogenate and in dermal extract of skin. The skin permeation rate of alkyl ester prodrugs was significantly higher than diclofenac with shorter lag time. Moreover, a parabolic relationship was observed between the permeation rate and the log P values of prodrugs, and the maximum flux was achieved at a log P value of around 4.0.

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