The Venpress CH tablet is intended to treat hypertension, or elevated blood pressure. The Venpres-CH 40mg/12.5mg Tablet contains a mixture of two medications: chlorthalidone and telmisartan. It is typically used when blood pressure cannot be adequately controlled by a single medication. In order to facilitate easier blood flow, telmisartan relaxes and widens your blood vessels. Your blood pressure will drop as a result. Chlorthalidone is a diuretic, or water pill, that lowers blood pressure by increasing urine production. Controlling your blood pressure lowers your chances of kidney issues, heart attacks, and strokes. For the medication to work, it must be taken as directed on a regular basis.