The effect of distribution of momethazone furoat in emulsions on its anti-inflammatory action
DOI:
https://doi.org/10.24959/cphj.17.1441Keywords:
mometasone furoate, solvent, emulsion, cream, distribution, pharmaceutical factor, edema, rats, anti-inflammatory effectAbstract
Aim. To study distribution of mometasone furoate (MF) in emulsions of the 1st (o/w) and 2nd (w/o) types with different excipients, as well as to conduct a comparative experimental study of the anti-inflammatory effect of 0.1 % creams of MF with these emulsions as a vehicle.
Materials and methods. When studying its solubility, distribution between phases and solubilization by surfactant micelles the method of liquid chromatography was used for assay of MF; optical microscopy was used for determination of the disperse system type. The anti-inflammatory activity was studied on the dextran-induced rat paw edema and aerosol-induced rat paw edema.
Results. The solubility of MF in various hydrophilic and lipophilic solvents, distribution between the liquid paraffin and the hydrophilic solvent hexylene glycol–water (8:2), as well as solubilization by micelles of surfactants have been studied, it allows to predict the disperse state, distribution and localization of MF in emulsions of type 1 and 2, which are the vehicles for soft dosage forms. The dispersed state of MF in emulsions of type 1 and 2 has been confirmed by optical microscopy. The anti-inflammatory activity of 0.1 % Mometasone cream (a vehicle – o/w emulsion where MF is mostly in the form of a suspension) and 0.1 % Elocom® cream (a vehicle – w/o emulsion where MF is mostly dissolved in a dispersed hydrophilic phase) was studied. It has been determined that the dynamics of the anti-inflammatory effects (AE) for both drugs differs depending on the type of inflammatory edema; however, both drugs compared have a similar dynamics of AE under conditions of the same edema. It indicates that the type and concentration of glucocorticosteroid is a determining pharmaceutical factor for AE dynamic. Under conditions of the dextran-induced rat paw edema there is a pronounced tendency towards a higher AE in case of 0.1 % Mometasone cream (a vehicle – o/w emulsion) compared to 0.1 % Elocom® cream (a vehicle – w/o emulsion). It indicates the impact of differences in the pharmaceutical factors of these drugs on the efficiency of their anti-inflammatory activity. In the conditions of an aerosol-induced rat paw edema AE of 0.1 % Mometasone cream (a vehicle – o/w emulsion) basically corresponds to AE of 0.1 % Elocom® cream (a vehicle – w/o emulsion).
Conclusions. According to the results of the research the cream with MF and the o/w emulsion as a vehicle should be used in the acute phase of the inflammatory process accompanied with exudation, while the cream or ointment with the w/o emulsion as a vehicle – for the treatment of chronic dermatoses accompanied with a dry skin.
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