There is a common myth going around about race, drug use and arrests. The myth says that blacks and whites use drugs at the same rate, but blacks are arrested for drug crimes more, indicating racism in enforcement of drug laws.

Studies that claim to show that blacks and whites use drugs at the same rates are based on surveys. The thing is, people lie on surveys. Lots of people who take drugs are not going to tell a researcher that they do so.

jail arrested arrest prison311 300x178 Black People Use Drugs More Than White People: They Just Lie About It.  Many of the people the researchers asked who said that they didn’t take drugs were lying about it. It’s common sense. Surveys are not an accurate way to determine the rates at which people use drugs. Just because x amount of people admitted to taking drugs does not mean that those are the only people in the survey who take drugs.  More people asked actually use drugs, but lied about it.

And studies show that African Americans do lie about drug use more then whites. 

A 2001 study from the National Center for Biotechnology Information found that when people arrested for crimes were asked abut drug use and tested, blacks were more likely then whites to lie about marijuana and methamphetamine.

There is also a 2003 report from Addictive Behaviors which surveyed 290 black men who were being treated for high blood pressure. 48 of the men admitted to using illegal drugs. But urine tests found that 131 of the men were using illegal drugs. Even though only 19% of the men admitted to taking illegal drugs, 45% were using illegal drugs.

A study from 2005, in the Journal of Urban Health found that black people were 10 times more likely to lie about cocaine then whites. The study also found that Hispanics  were 5 times more likely to lie about cocaine then whites. The study also found that 0 of the 191 whites involved lied about marijuana whereas 1 in 8 of the 191 blacks in the sample lied about marijuana.

So is appears that black people are more likely to lie about drug use then white people.There is evidence that black people use illegal drugs at higher rats then white people. 
The Department of Health and Human Services releases yearly reports on the number of people who went to the emergency room after an illness or mental episode caused by illegal drug use. The racial demographics of these patients are recorded.
Black people are more likely to go to the emergency room because of illegal drug use then whites. Black people are almost 3 times more likely to go to the emergency room because of  marijuana use then whites and 7 times more likely to go to the ER because of cocaine use then whites.
Are black people taking drugs at the same rate as whites but going to the emergency room because of illegal drugs more? Of course not. Black people go to the ER because of problems caused by illegal drugs more then whites do because they take illegal drugs more then whites do. 
Also consider how  rates of non drug related crimes play into this. The FBI arrest data and National Crime Victimization Survey data show that black people are more likely to commit and be arrested for crimes then whites. They are more likely to commit robberies, burglaries, rapes, and murder among other crimes.
Because they are more likely to commit and be arrested for crimes then whites, they are more likely to be caught with drugs on them or in their system then whites. 
We can conclude that black people do take illegal drugs at a higher rate then white people, and are more likely to lie about their drug use then whites. We can also conclude that blacks are more likely to commit crime in general and are more likely to be caught with illegal drugs.