How often can i take .5mg lorazepam for anxiety without becoming addicted or needing to raise the dose for the same effect?

Excellent question!: Even when taken as prescribed, lorazepam can be abused as users can quickly develop tolerance and dependence, and struggling with an addiction. It varies individually. Work with prescriber and develop anxiety management strategies to eventually reduce/eliminate need for medication. Seek professional help if necessary. Consider: https://www.adaa.org/tips-manage-anxiety-and-stress