One of my medications is called Tramadol SR which is a prescription only medication which works in two ways and is given in slow release form (SR).
It’s mission is to interfere with the transmission of pain signals and trigger a release of brain hormones called norepinephrine and serotonin, both of which help to reduce pain.
The side effects include dizziness, sedation, headache, nausea and constipation.
Another medication I take is called Amatriptyline which is a tricyclic antidepressant. However in addition to relieving symptoms of depression, it can also work for pain by interfering with certain chemical processes in your brain that cause you to feel pain. I take these at night as they relax your muscles and can help you to go to sleep.
The side effects like many include constipation, drowsiness, dry mouth and weight gain.
Other simple pain relievers like Paracetamol, which I also take, control pain in different ways by interfering with pain messages.
These are generally safe but if taken regularly for months to years can cause nausea, stomach pain and liver problems. Only recently I read an article on the effects of paracetamol and your liver.