Commonly reported side effects of clonazepam include: drowsiness. Other side effects include: upper respiratory tract infection, ataxia, depression, and dizziness. See below for a comprehensive list of adverse effects. Hi topaz1943 Klonopin Sexual Side Effects: An Overview Klonopin® (clonazepam), like many other medications, is known to cause certain sexual side effects. Klonopin Sexual Side Effects Clinical studies have shown that Klonopin can cause certain sexual side effects, such as changes in sex drive, ejaculation problems, and impotence. If you experience any of these Klonopin sexual side effects, talk with your healthcare provider. Consumer information about the medication CLONAZEPAM - ORAL (Klonopin), includes side effects, drug interactions, recommended dosages, and storage information. Read more about the prescription drug CLONAZEPAM - ORAL. The sexual side effects which are caused by this Klonopin medication have the inclusion of changes in the sex drive, known as libido, premature ejaculation symptoms, and majorly it causes impotence. Generally, the impotence problem is also known as erectile dysfunction (ED). Doctors give trusted answers on uses, effects, side-effects, and cautions: Dr. Hoffman on clonazepam side effects in men: Zolpidem or Ambien (zolpidem) is a short acting sleeping med which often doesn't make someone tired. So you need to go to bed right after taking. People have fallen going for a walk waiting for it to take effect. Sleep. Side Effects. Drug information provided by: IBM Micromedex. Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention. Common side effects of Klonopin (clonazepam) The most common side effect of clonazepam is drowsiness. For those prescribed Klonopin for insomnia this is a wanted side effect, but for those that are prescribed Klonopin for day time use this side effect can be very unpleasant and debilitating. The sedative effects of clonazepam may last longer in older adults. Accidental falls are common in elderly patients who take benzodiazepines. Use caution to avoid falling or accidental injury while you are taking clonazepam. If you have been prescribed Klonopin, you should take the time to educate yourself about the possible side effects, withdrawal symptoms, and symptoms of overdose.