Loss of Self Control
The first thing most people are going to start noticing in terms of poor side effects has to do with their complete loss of self control. When a person is not able to control themselves, it leads to going down a path that is very hard to come back from and it has all to do with their inability to just stop taking heroin in the first place. It is recommended to make sure that black tar does not become a major issue by going to a rehab facility as soon as possible.
Impatience
This is a poor side effect that is often associated with the use of heroin and it has more to do with the individual's personality as a whole. Smack has the ability to reduce a person completely to a point where they are unable to function as they would want to.
Learning about all of the side effects that come along with this issue is key in the modern age and those that do realize this are going to get more out of their rehabilitation than those who do not.