Differences between BRUNNER & SUDDARTH'S 11th and 12th editions

[corsair]

Hi, I am wondering if anyone had compared BRUNNER & SUDDARTH'S Textbook of Medical Surgical Nursing Editions 11 and 12. I am supposed to buy the 12th edition package for $180 and I can get the 11th edition for around $50. I know usually the page numbers are usually different but I was wondering if anyone had seen any different information between the two. I also was wondering about Focus on Pharmacology by Amy Karch, editions 4 and 5 (specifically have the drugs changed that much, I know that an obstetrics chapter was added to the 5th edition, but someone already gave me the 4th edition so I would like to use it).

Thanks

[twitter]

Anyone need a 13th edition?