Yes, avoid drugs at all cost. That’s why the Singapore laws are designed to make it extremely high price for those who dabble in the business of bring drugs to this island. Not that it can totally eliminate drugs, but at least it creates a barrier to entry. That said, it also much depends on you to make your choice, for as the Bible says, seek and you shall find. If you seek drugs, you will find drugs. Sooner or later. So don’t even try. And I am happy for you that your sister is out and back home and hopefully with no long lasting impact to her brain and body. It will be a tough way back to normal life for her, so please support her. I am rooting for her, and if she needs help finding a job, there are lots of resources that she can call upon.