What effects can some prescription and non-prescription medications have on a person?

• They can cause drowsiness or dizziness.
  Explanation:

  "Some prescription and non-prescription (over-the-counter) medications can have an impairing effect on your vehicle-handling ability, judgment, and responsible decision-making when operating a vehicle. Side effects can include drowsiness or dizziness."
• They can cause fatigue.
• They can cause nervousness.
• They do not cause any effect.