Here is a graphic showing equivalence of various alcoholic drinks:

http://rethinkingdrinking.niaaa.nih....ndarddrink.asp

Hence 4 whiskeys (6oz) = 4 -- twelve oz beers.

The body does not separate out what form the alcohol is in.
A breath test by a police officer will register intake independently from the type of alcohol consumed.

Remember CONGENERS in various drinks may affect nerves, as well as gluten (beers) and yeasts.(in wines and beers).
This is what a congener is:
http://en.wikipedia.org/wiki/Congener
Congeners are thought to create hangovers. Hence the quality charcoal filtered vodkas, which have them removed.

People with gluten intolerance will have significant reactions to beers independently from the alcohol content. There are gluten free beers with alcohol in them.

It is highly idiosyncratic how people with PN will respond to various alcoholic beverages, therefore.

% alcohol content of beers:
http://www.alcoholcontents.com/beer/

If you are still taking that clonazepam, you should avoid alcohol consumption, but you probably know that already.