Cicletanine is a furopyridine low-ceiling diuretic drug, usually used in the treatment of hypertension. The drug is manufactured by Ipsen and marketed by Recordati (in France) under the trade name Tenstaten. Cicletanine is a furopyridine low-ceiling diuretic drug, usually used in the treatment of hypertension. The drug is manufactured by Ipsen and marketed by Recordati (in France) under the trade name Tenstaten. It appears to be more potent in salt-sensitive hypertension. It can inhibit protein kinase C.