Expected Ativan Side Effects: Drowsiness and mild nervous system depression during the day following use at bedtime are normal and expected side effects of this medication. Normal use may cause mild central nervous system depression, but dosage should be managed to minimize this. Do not drive or perform any other potentially hazardous activities until you are familiar with your reaction to this medication and know how long it takes to clear from your body. THis is a very effective drug for anxiety. Withdrawl symptoms can be evident and unpleasent if I've used my prescription too quickly in a given month. I take 60 .5mg tablets every thirty days. This medicine has wonderful potential to help anxious people feel comfortable; however, it must be used with descretion. I have discussed increasing my dose or number of tablets with my doctor, but am concerned with withdrawl symptoms. Three tablets a day may be better than two, but eventially I'm afraid I would require four and on. Each patient and physician should determine the dose and frequency based on the individual's condtion, body and response to therapy.