“…BK Ca channels; pig coronary artery, Ottolia & Toro, 1994) and α 1 ‐adrenoceptor‐activated nonselective cation currents (rabbit portal vein, Yamada et al ., 1996). Recently, we have directly demonstrated the effects of mefenamic acid on several types of K + channels in pig urethra by use of single‐channel recordings (Teramoto et al ., 2003). In this tissue, mefenamic acid increased the activity of BK Ca channels and ATP‐sensitive K + channels (K ATP channels) and decreased the activity of 4‐aminopyridine (4‐AP)‐sensitive K + channels.…”