Like all other 17aa's there's an ongoing argument as to whether they're more effective taken orally or IM.
I have a study that claims Winstrol used by I believe it was sled dogs. Showed a 37%(?) increase in effectiveness when taken IM.
But we're talking one study here, and I'm assuming what you have probably was damn cheap. The injects most likely will be painful, and it is an underground lab so sterility isn't as sure as from other origins.
I'd just drink it.