Taking steroids even just once can have a range of short-term effects on the body. One common effect is an increase in muscle size and strength, as steroids can enhance protein synthesis and promote the growth of muscle tissue. However, this can be accompanied by fluid retention, leading to a puffy or bloated appearance. Steroids may also cause a temporary boost in energy and aggression, sometimes referred to as roid rage. Additionally, users may experience side effects such as acne, trouble sleeping, and mood swings. It's important to note that the severity and duration of these effects can vary depending on the type and dosage of steroids used, as well as the individual's physiology and overall health.