Study on Nasal Mucosa Absorption in Vivo of Tetramethylpyrazine Hydrochloride in Rats / 中成药

Objective: To investigate the characteristic of nasal mucosa absorption in vivo of tetramethylpyrazine hydrochloride (TMP HCl) in rats. Methods: The nasal circulatory perfusion test of TMP HCl was performed in rats.Results: The absorption rate constants was increased with the increasing of the concentration of TMP HCl; The absorption rate constants was increased with the elevating of pH values at the pH value range of 4.70～7.00. Conclusion:When the pH value of nasal circulatory perfusion liquid of TMP HCl is 7.00, the nasal mucosa absorption is optimal.