Steroids are such a big problem in lifting that some powerlifting federations even put the words Drug Free right into their name. Drugs can make you stronger, especially if you train hard and eat like a starving Chihuahua going after a Taco Bell stand. But, drugs can also screw up your body, increase your risk of cancer, and give you a host of other health problems. If you spend much time in powerlifting, or even just reading about powerlifting, be prepared to hear about the drugs. The debates on the Go.
Heavy forums are usually fast and furious, because opinions vary greatly on the subject.
Personally, I believe almost anyone can get strong without them, if they are willing to be patient and take care of themselves. Eating, sleeping, and living life peacefully will enable you to benefit plenty from those trips to the gym. Pill Piche has written an FAQ on Powerlifting which many have found helpful as a beginner. While this has a lot of good information, the training methods described are by no means comprehensive. There are many other types of powerlifting training methods out there, including Westside, 3x3, Russian, Bulgarian, and many others which can also be used.