Defense Threat Reduction Agency. When DTRA employees arrive at work every morning, they are addressing the number one national security threat we face as a nation. The threat of WMD is a threat that can change everything about the way in which Americans live their lives. Our mission at the Defense Threat Reduction Agency (DTRA) â to safeguard the United States and its allies from weapons of mass destruction â is of paramount importance for the defense of our country.
Levitra is the brand name for vardenafil, an oral medication used to treat men who have sexual impotence, also known as erectile dysfunction or ED.It's part of a group of drugs known as phosphodiesterase-5 (PDE5) inhibitors.evitra increases venous congestion in that area and helps a man get and keep an erection during sexual intercourse. By itself, Levitra does not cause an erection-there must also be physical stimulation of the penis to achieve an erection.
ED usually has a physical cause. LEVITRA helps improve erectile function by increasing blood flow to the penis. LEVITRA has helped many men and it may help you, too. LEVITRA can cause your blood pressure to drop suddenly to an unsafe level if it is taken with certain other medicines. Do not take LEVITRA if you: 2  Take any medications called nitrates (often used to control chest pain, also known as angina), or if you use recreational drugs called poppers like amyl nitrate and butyl nitrate.