Comparative Study of Chemical Stability of Two H<sub>1</sub> Antihistaminic Drugs, Terfenadine and Its <i>In Vivo</i> Metabolite Fexofenadine, Using LC-UV Methods

<div>(a) <i>In vivo</i> conversion of terfenadine (TER) to fexofenadine (FEX); (b) isocationic and neutral forms of TER; (c) isocationic, neutral, and isoanionic forms of FEX.</div>

Journal of Analytical Methods in Chemistry

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Figure 1

Figure 1: Comparative Study of Chemical Stability of Two H<sub>1</sub> Antihistaminic Drugs, Terfenadine and Its <i>In Vivo</i> Metabolite Fexofenadine, Using LC-UV Methods 

Figure 1 | Comparative Study of Chemical Stability of Two H1 Antihistaminic Drugs, Terfenadine and Its In Vivo Metabolite Fexofenadine, Using LC-UV Methods 