The original brand name of oxandrolone was Anavar, which was marketed in the United States and the Netherlands .   This product was eventually discontinued and replaced in the United States with a new product named Oxandrin, which is the sole remaining brand name for oxandrolone in the United States.   Oxandrolone has also been sold under the brand names Antitriol ( Spain ), Anatrophill ( France ), Lipidex ( Brazil ), Lonavar ( Argentina , Australia , Italy ), Protivar, and Vasorome ( Japan ) among others.     Additional brand names exist for products that are manufactured for the steroid black market. 
First of all, any type of pro-hormone taken orally has to be processed by your liver, and this can cause damage over time. Injecting directly into the muscle bypasses this process completely and spares your liver. Second, most of those alternative products have dozens of ingredients that are hastily created in labs, not reviewed or approved by the FDA, and not necessarily safe. With Testosterone Propionate, you do not have to worry about any of that, because the only ingredient is a natural hormone that is chemically identical to something produced by your own body.
First things first. Sterility. Only use new pins and do not share, do not let the pins make contact with anything that may be hazardous by keeping the plastic covering on when not being used, use substances which you are sure are legit, reputable, and are sterile, wash hands thoroughly before any procedures, inject in a clean sterile environment, and make sure the injection site is cleaned with antibacterial agents before and after administration. It’s easy to just skip this paragraph or become lazy over time, thinking that you will be fine. If you want to reduce your risk of infections (which can be very painful and put you out of training for a while), then always think about sterility before and after administration. Be smart.