I believe it is safe to purchase medicine online as long as it is done through a professional website. Get it from the brands of the medicine or a place that a doctor recommends is probably the best bet when it comes to this. When purchasing anything online it can be risky, but just needs to be done right.
It is not safe to purchase medicine online. When you buy online, it is hard to know where exactly the medicine comes from, and when you are trying to save your life by taking medicine, you should know where the medicine comes from. Also, if you have a problem with the medicine, it is hard to get some one on the phone to answer your questions.