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In 1864, the first barbiturate (barbituric acid) was synthesized.

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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.

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Recent studies have shown that the number of medication errors increases in relation to the number of orders that are verified per pharmacist, per work shift.

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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

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Over time, chronic hepatitis B virus and hepatitis C virus infections can progress to advanced liver disease, liver failure, and hepatocellular carcinoma. Unlike other forms, more than 80% of hepatitis C infections become chronic and lead to liver disease. When combined with hepatitis B, hepatitis C now accounts for 75% percent of all cases of liver disease around the world. Liver failure caused by hepatitis C is now leading cause of liver transplants in the United States.

Indian Palm Squirrel Indian Palm Squirrel
A downward-sloping spark line usually indicates high secondary ignition system resistance or an ... A downward-sloping spark line usually indicates high secondary ignition system resistance or an ...
Cat paw mobilizing of shoulders toward the feet. Press downward along upper trapezius muscle from ... Cat paw mobilizing of shoulders toward the feet. Press downward along upper trapezius muscle from ...
Neck stretch. Rest the receiver’s head on the palm of your right hand, taking a firm hold on the ... Neck stretch. Rest the receiver’s head on the palm of your right hand, taking a firm hold on the ...
Your nose runs like a leaky faucet and turns beet red from constant wiping Your nose runs like a leaky faucet and turns beet red from constant wiping
Testing rapid alternating movement, palm down Testing rapid alternating movement, palm down
Video: Major Elements in Biological Molecules: Proteins

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