Klonopin is effective but may be accompanied by some unintended side effects. The side effects that usually subside on their own with continued use include drowsiness, irritability, lack of motivation, loss of libido, dizziness, loss of balance, loss of coordination, and aggression among many others. Klonopin Sale. Most of these symptoms will subside on their own, but if they do not patients should contact their doctors immediately to determine if Klonopin is still the best choice for treatment.