If you need eye drops for dry eyes â known as artificial tears â choose a brand without the preservative benzalkonium chloride, which can cause irritation, says Andrew Lotery, professor of ophthalmology at the University of Southampton. âYou tend to find it in eye drops that come in bottles,â he says.
Endorphins are natural opium-like hormones that are produced by the pituitary gland and the hypothalamus of your body. Endorphins act on your brain's opiate receptors to block their ability to receive pain messages from the sensory nerves. This makes you less sensitive to pain. Endorphins also work on your emotions.
At least 20 types of endorphins have been demonstrated in humans. Endorphins can be found in the pituitary gland, in other parts of the brain, or distributed throughout the nervous system. Stress and pain are the two most common factors leading to the release of endorphins.Endorphins interact with the opiate receptors in the brain to reduce our perception of pain and act similarly to drugs such as morphine and codeine.In contrast to the opiate drugs, however, activation of the opiate receptors by the body's endorphins does not lead to addiction or dependence.ndorphins interact with the opiate receptors in the brain to reduce our perception of pain and act similarly to drugs such as morphine and codeine. In contrast to the opiate drugs, however, activation of the opiate receptors by the body's endorphins does not lead to addiction or dependence.