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.
Answers. Best Answer: Mechanism for transmitting pain is by the chemicals found in every nerve cell, called neurotransmitters. These either send or block pain messages. Serotonin is one such neurotransmitter.It blocks pain and induces a feeling of well-being. Endorphin is another neurotransmitter, a natural pain killer similar to morphine. The level of these chemicals varies between people and their production can be voluntarily increased, for example by vigorous exercise.erotonin is one such neurotransmitter. It blocks pain and induces a feeling of well-being. Endorphin is another neurotransmitter, a natural pain killer similar to morphine. The level of these chemicals varies between people and their production can be voluntarily increased, for example by vigorous exercise.