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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.
Despite claims by manufacturers, the supplement known as Ginkgo biloba was shown in a study of more than 3,000 participants to be ineffective in reducing development of dementia and Alzheimer’s disease in older people.
If all the neurons in the human body were lined up, they would stretch more than 600 miles.
More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.
In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.