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70 results about "Terfenadine" patented technology

Terfenadine is an antihistamine formerly used for the treatment of allergic conditions. It was brought to market by Hoechst Marion Roussel (now Sanofi-Aventis) and was marketed under various brand names, including Seldane in the United States, Triludan in the United Kingdom, and Teldane in Australia. It was superseded by fexofenadine in the 1990s due to the risk of a particular type of disruption of the electrical rhythms of the heart (specifically cardiac arrhythmia caused by QT interval prolongation) and has been withdrawn from markets worldwide.

Verification and separation method for terfenadine related substance

The invention discloses a verification and separation method for a terfenadine related substance. The method comprises the following steps: 1) respectively putting 70% acetonitrile into impurities anda proper amount of TFND (Terfenadine) so as to obtain a 10mu g/mL single solution, performing full-wavelength scanning at wavelengths of 190-400nm so as to obtain scanning wavelengths of different substances, and confirming ultraviolet scanning detection wavelengths; 2) preparing a mixed solution for detection; 3) setting the following spectrum conditions: a spectrum column: MZ-NALYTICAL Column of 250*4.6mm 100ODS 5mu m; a mobile phase A: acetonitrile and phosphate in a ratio of 20:80; a mobile phase B: acetonitrile; gradient elution: 0 minute, 60%A, 40% B, 3 minutes, 55%A, 45%B, 20 minutes,20% A and 80%B; a solvent of acetonitrile and phosphate in a ratio of 45:55; a wavelength of 217nm; a flowing velocity of 1.0mL/minute; a column temperature of 30-35 DEG C; a sampling amount of 20mu L; 4) feeding the mixed solution as a sample, recording chromatogram, and separating both terfenadine and different impurities. By adopting the method, the separation degree of the terfenadine and theimpurities is greater than 5.0, the separation degrees among the impurities and between other known impurities and the terfenadine are both greater than 1.5, in addition, the separation degree of a main peak and unknown impurities can be up to 3.5, and requirements can be met.
Owner:JIANGSU LIANHUAN PHARMA
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