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Inhibitory effects of drugs in a dose-response manner. Half inhibitory concentrations (IC50) were analyzed either in the presence or absence of amiloride, diphenhydramine (DPH), donepezil, and nifedipine at concentrations of 0–2 mM at pH 7.4 and 37 °C on the uptake of [3H]choline in the MT cell line. The data represents mean ± S.E.M (n = 3–4).
