@SarahGen-- Xanax bars are high doses of the drug but they are prescribed if someone is experiencing severe issues that do not respond to lower doses. It's important to follow the doctor's orders while taking these. They should not be taken longer than they are prescribed or in greater doses as it could be very dangerous.
I'm not a fan of Xanax because I had a very hard time getting off of them. I experienced many withdrawal symptoms. It was just an unpleasant experience. That being said, I know that they work best for some people. If someone is dealing with severe anxiety and suicidal thoughts, it's better to be on something like Xanax than to take the risk of harming yourself or others.
The risk of abuse may be greater with Xanax bars though since the doses are higher and the patient may be given some leeway about the dose. So I don't think that the bars should be prescribed in every case. Almost always, the tablets will be enough.