Could you tell me what happens when you mix ativan/lorazepam with an over-the-counter sleeping aid?

Intensify each other: Both medications can sedate. Therefore depending on the dosage, timing, other medication being taken and the condition of the person taking them, there is the potential for a dangerous situation. Therefore it is always a good idea to discuss with your physician the plan to add additional medications even if they are in the form of over the counter preparations.