35 years old.
Got my BA in Psychology back in 2000.
But, I'm worried that I'll have to take most of my grunt work course again. So be it if I have to.
If you have a BA already, you probably wouldn't need to take the pre-requisites like English, Econ, etc. The science stuff, maybe or probably. Talk to the school about which of your credits are transferable and what all you'd need to take.
The usual required science stuff is 1 yr of inorganic chem, 1 yr of organic chem, 1 year of bio, 1 semester of physics, 1 semester of calculus.
Also, take the P-CATs when you're ready. They're easier than the M-CATs. And if you get a good score, the school would be less stringent about requiring recent class credits.
Good luck. It's a great career path. Retail can be brutal (yes, you often never sit, eat, or ever stop during your insane shift), but it pays well. And there's lots of other types of jobs available - clinical, academic, industry, consulting, compounding, etc