Breathe into paper bag. Alprazolam, clonazepam, and lorazepam all work. For prevention, any SSRI, SNRI, or number of other antidepressants, which should of course not be used if you have any bipolarity.

See this link...
https://consumershealth.org/anti-anxiety-guide/?msclkid=762ab6398d9412fad9fdeb977194b116

Also:
https://www.anxieti.org/products-comparison/?msclkid=3256a7bfa6b7193aa659fa115ae778c3&utm_source=bing&utm_medium=cpc&utm_campaign=US%20-%20Partners%20-%20Product&utm_term=best%20treatments%20for%20anxiety&utm_content=Treatment%20-%20Exact