Peripherally acting antiadrenergic medicines keep the adrenal glands, brain, and other tissues from releasing catecholamines, and that makes the heart beat more slowly and with less force. They also widen and relax the blood vessels causing the blood to flow through them more easily. Both of these actions decrease the blood pressure.
Regular Websites
The official site for Hytrin, generic name terazosin hydrochloride, offers details about why it is prescribed, what side effects are possible, and updated news items which are relevant. - Hytrin
http://www.hytrin.net/
The company site for Inversine (mecamylamine CHI) which is used for management of hypertension showcases Targacept's its acquisition of the brand, the science behind it, and prescribing information. - Targacept: Inversine
http://www.targacept.com/wt/page/inversine