So, if you have arthritis and a meniscus condition in your knee, you can only receive a rating for one of the two conditions, whichever gives the higher rating. So, if your arthritis gives a higher rating than the meniscus condition, then it is rated, and the other is ignored. Only one rating per joint.
Drugs are chemicals that can alter the way the body works. There are different types of drugs, and these have different effects on the body. Tobacco and alcohol are legal recreational drugs which have potentially serious effects on the body. Illegal drugs are classified on a scale from Class A - the most dangerous - to Class C - the least dangerous.
The drugs they looked at were heroin, cannabis, nicotine, alcohol, methadone, amphetamine and MDMA. As described in Scientific Reports, they found that, at the level of individual use, four substances were classified as high risk: alcohol, nicotine, cocaine and heroin.