Originally Posted by
sisterstruggle 
Is it possible for someone to use heroin 5-10 times (as my sister claims) and NOT be an addict? Or is she completely bullshitting us?
I feel for you. Though I was on the other end, I see now what my addiction did to my family.
Heroin was not my drug of choice, so I don't know about the specific questions related to that drug. What I can say, is yes, she is completely bullshitting you all. Addicts are liars and manipulators. In the midst of active addiction, they will do or say anything to be able to keep using. I can't say for sure, but from what you've described I would say that your sister is an addict.
You've said as much yourself and other have posted some great advice, but you cannot be responsible for your sisters actions. I can only imagine how painful it is to watch someone you love destroy themselves, but she is the one that needs to make the decision to seek recovery.
Have you considered going to an al-anon meeting?
Stay strong.