Valium is typically used on a short-term basis due to its potential for tolerance, dependence, and addiction. It is important to follow the prescribed dosage and duration of treatment as directed by a healthcare provider to minimize the risk of developing these issues. Common side effects of Valium may include drowsiness, dizziness, blurred vision, and confusion. It can also impair cognitive and motor functions, so it is important to avoid activities that require mental alertness, such as driving or operating machinery, while taking Valium.