|
Author Question: The Johnsons are frustrated with their 17-year-old son, Skip. He spends little time with the family ... (Read 25 times) |
Sildenafil (Viagra®) has two actions that may be of consequence in patients with heart disease. It can lower the blood pressure, and it can interact with nitrates. It should never be used in patients who are taking nitrates.
Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.
Approximately 500,000 babies are born each year in the United States to teenage mothers.
There are more nerve cells in one human brain than there are stars in the Milky Way.
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.