Harmful effects of include oversensitivity to light, increased risk of heart attack and stroke, liver damage, thinning of the blood, and deterioration of the stomach lining.

Harmful effects of pain relievers include over-sensitivity to light, increased risk of heart attack and stroke, liver damage, thinning of the blood, and deterioration of the stomach lining.
Pain relievers also known as pain killers are used to reduce or eliminate pain. But there are many harmful effects also. There are many pain relievers which are available without prescription but there are some which are not. pain killers if overdosed, it can be fatal.