Keytruda is given by intravenous (IV) infusion every 3 weeks until disease progression, unacceptable toxicity, or up to 24 months. It is currently a non-preferred brand, specialty medication on standard NPS formularies and carries an average wholesale price (AWP) of $515.79 per day. FDA Safety Update
Tears come from the lacrimal gland. And it's found in the outer part of the upper eye. When excess tears are produced, they drain into small ducts to the nasal cavity. And if you have too many tears to drain, they'll spill out of your eyes. There's an anatomical reason why crying makes your nose run.
Tears are a combination of water, for moisture; oils, for lubrication; mucus, for even spreading; and antibodies and special proteins, for resistance to infection. These components are secreted by special glands located around the eye. When there is an imbalance in this tear system, a person may experience dry eyes. When tears do not adequately lubricate the eye, a person may experience: 1  Pain. 2  Light sensitivity. 3  A gritty sensation. 4  A feeling of a foreign body or sand in the eye.