Weight Gain
Movement Disorder Medicines
Anxiety-Antidepressant Medications
Antidepressant Adverse Effects
Warnings~Adolescents Under 25
Sertraline ~Zoloft
Anti-psychotic Medications
Prozac, Luvox, Paxil, Zoloft & Celexa
Olanzipine & Risperidone and blood tests
Cutting Prescriptions
Sites That Help the Medicine Go Down
Vitamins & Minerals
Why Certain Symptoms Occur In HD
Tests Commonly Used -Neuropsychological Examination
Symptom vs Medication
Speech & Swallowing Difficulties~Lynn Rhodes
Swallowing Problem Warning Signs
Swallowing Tests
Nutrition and HD~Anna Gaba (Recipes)
HD & Diet~HSA Fact Sheet 7
HD~Swallowing & Nutrition
Weight Gain
5 Levels Difficulty In Swallowing
Feeding Tube~Advanced Stages of HD
Feeding Tube~Jean Miller
One more word on feeding tubes
PEG Tubes and baby foods
Feeding Tubes-More Info
HD~Falling/Safety Issues
HD~Cognitive/Decision Making/Impulsivity
Cognitive-Short Tips
Denial of HD
HD~Irritability/Temper Outbursts
Managing behavioral problems
Depression - Treatment Resistant Patient
HD~Mania, Obsessive Disorders
HD~Hallucinations & Psychosis
HD~Rigidity, Spasticity, and Dystonia
Adaptive Products
Teen Suicide~Let's Talk Facts
Stress Explained-Easy/Fun Format
How To Help Someone Chronically Ill
Legal Planning for Incapacity
Out-of-Home Care Options FAQ
Preparing for Emergencies
I added some URL for the medications discussed below. Although article discusses elderly, it's the medications available I was interested in that help in HIV, anorexic patients, etc. gain weight.  These are just potential things that could be discussed with your doctor to help put on weight.

Strategies to Increase Body Weight

Because of the increased morbidity and mortality among elderly people who have a chronically low BMI or who have experienced involuntary weight loss, strategies to increase appetite, food intake, and body weight are critically important.
While the use of nutritional supplements may result in small (if any) improvements in weight, these supplements may not be effective in patients who are chronically underweight or cachectic.

Megestrol acetate (MA), a synthetic progestin, has been reported to increase appetite and body weight in anorexic patients with cancer and HIV infection. Yeh and colleagues  examined the effects of MA in elderly nursing home patients who had lost 5% or more of their body weight in the previous 3 months or who were at least 20% under their ideal BMI.

They reported that 800 mg of MA per day resulted in increased appetite, increased food intake as measured by dietary recall, and a delayed (13 weeks after the cessation of MA) increase in body weight.
The Nutrition, Exercise, and Metabolism Laboratory at the Donald W. Reynolds Department of Geriatrics, University of Arkansas for Medical
Sciences, Little Rock, Arkansas, has also demonstrated that MA resulted in a substantial increase in appetite, total daily energy intake, and body weight in a group of underweight older men,  This effect may be important to clinicians and registered dietitians who attempt to stimulate weight gain in elderly people.

Other potential appetite stimulants that have been used in elderly people include oxandrolone, an anabolic steroid that may increase appetite and stimulate muscle growth; and dronabinol, which is tetrahydrocannabinol, a derivative of cannabis.

Dronabinol has been approved by the US Food and Drug Administration to stimulate appetite in wasted patients with AIDS, and it prevents nausea due to chemotherapy in patients with cancer. Its use in treating underweight elderly men and women has not yet been adequately
tested, but has shown some potential benefits.

Source:  Medscape's
Nursing Clinical Management Volume 3
Aging and Malnutrition: Treatment Guidelines  CME

MEGACE (megestrol acetate)
for the PDF formated sheet that comes with this drug, to to Bristol
Meyers and on the upper right
hand side, go to Megace.

Dronabinol  (Delta-9-tetrahydro-cannabinol)

oxandrolone/anabolic steroid
nothing located.