> There's evidence that they increase the risk of cancer as well as other diseases All drugs can have negative effects, but in the end it comes down to what's

> There's evidence that they increase the risk of cancer as well as other diseases All drugs can have negative effects, but in the end it comes down to what's the risk/reward ratio. If someone is in constant pain and barely can do anything it really doesn't matter if you die 5 or 20 years down the road to cancer when you get x years to live somewhat normal life. Life in extreme suffering can be worse than death. This is based on personal experience.