too much of a weight loss-85 lbs!

My friend's Mom had her gastric bypass surgery in 2001 and since then, her health has deteriorated to the point where she is down to 85 lbs and is continuing to lose more weight.  Her doctor says that she isn't absorbing anything.  I asked what vitamins she's taking and she said Centrum Silver.    My surgeon, Dr. Patricia Choban in Groveport, Ohio, told me that I will have to take prenatal vitamins for the rest of my life because of the malabsorption and that over-the-counter vitamins don't have enough iron in them.  I know when I haven't taken mine for a few days because I get very tired.  I told my friend that her mom needs to start on prenatals and iron supplements ASAP.  Her mom is extremely tired, weak, and her back hurts very badly.  Any advice?

Is the Centrum all she is taking?????
She needs a lot more than vitamins, at 85lbs they are not going to do a whole lot at this point to help regain her energy.  She is clearly in crisis and needs to see someone else to look at some sort of revision.
She needs to be on prenatals, B-Complex, B-12 sublingual or injections, Calcium citrate, probably iron and who knows what else she is deficient in.  

I think your friend's Mom needs to get to a doctor and get this straightened out.  I also take Centrum Silver chewables and my NUT said there is no iron in it,  to switch to something else. 

Your friends moms condition is almost like having Anorexia. She needs help now.. Being anemic can kill her. I wish her the best and please keep us posted!

When I went to the nutritionalist she told me specifically not to take centrum silver but regular centrum along with many other extra vitamins was good. I havent had my surgery yet but I am going by what I have been told. I hope she gets to the doctor and gets better I will keep her in my prayers.

She needs to find a bariatric surgeon who will see her. ASAP  A PCP does not know enough to help.

If you're in or close to Columbus, I'd suggest a call to OSU's bariatric program or Riverside.  EXPLAIN exactly what has happened.

The minimum needed would be bloodwork, big time bariatric vitamins, protein shakes and bars.

She needs to see someone who knows what they are doing NOW!!!

This is one of the reasons all weight loss surgery candidates are screened for eating disorders prior to WLS.  There are a few in the world for whom the loss of excess weight creates such a  feeling of vulnerability, becomes so scary, that it may trigger a previously unidentified anorexia or bulemia.  Could she possibly have had an eating disorder prior to surgery?  I personally do not believe morbid obesity always indicates an eating disorder, but it sure can MASK one.  I also believe people become obese from simple stress, and the same stress can cause one to become compulsive about MANY things, including eating habits.  This lady needs a complete work-up for endocrine and metabolic problems, psychiatric evaluation, upper and lower endoscopy, search for cancers, autoimmune disease and malabsorptive disorders that might have pre-existed her bypass.  One primary cause of suboptimal results is alcohol and drug addictions, these should also be ruled out.  It is VERY unusual for bypass performed with standard roux-en-Y technique anytime after 1985 to cause permanent disabling malabsorption. 
The symptoms of 'tired, weak' could be anemia or protein deficiency generally; back pain could be anemia, osteoporosis, hypokalemia, Vit D deficiency, Vit K deficiency, hypomagnesemia, renal failure, constipation, or (again) protein deficiency.  Prenatals of any brand will never help her, she may in fact require injectables for a time in order to get straight again, and I would never go without vitamin supplements in CHEWABLE or LIQUID FORM, and specially formulated for use after WLS (check out Bariatric Advantage).  If price is an issue many of these large manufacturers have special pricing structures for the financially disadvantaged, getting a Dr's prescription may also make insurance reimbursement possible. 

She may benefit from nutritional specialist to re-structure her eating plan, but thorough medical eval is crucial.  Your post does not indicate if her dr is doing any of this??