Dr. Drew Is Pro Guns

9/25/2008 2:50 PM PDT BY TMZ STAFF
"Celebrity Rehab" star Dr. Drew Pinsky appears to be hooked on working out. Who knew?!
Stryker, Titan and Dr. Drew
The 50-year-old doc (right) compared ripped biceps with his less endowed "Loveline" co-host Stryker (left) and ridiculously pumped "American Gladiator" Titan (center).

Can you get addicted to protein shakes?