Obesity Medication

Aka: Obesity Medication, Appetite Suppressants, Appetite Depressants, Anti-Obesity Agents

1. See Also
   1. Obesity
   2. Obesity in Children
   3. Obesity Evaluation
   4. Obesity Measurement (or Obesity Screening)
   5. Obesity Risk (or Obesity Comorbid Conditions)
   6. Obesity Management
   7. Dietary Supplements in Obesity
   8. Exercise in Obesity
   9. Obesity Resources
   10. Medications Associated with Weight Gain
2. Indications
   1. Follow indications strictly!!
   2. Morbid Obesity (BMI>30)
   3. Moderate Obesity (BMI 27) with comorbidity
3. Approach
   1. Employ all other weight loss strategies concurrently
      1. See Obesity Management
      2. See Exercise in Obesity
      3. Avoid Medications Associated with Weight Gain
   2. First-line agents
      1. Orlistat
         1. Preferred among the Obesity Medications as first -line
   3. Reevaluate efficacy, compliance and adverse effects on a schedule
      1. Stop weight loss medications if patient fails to lose 5% body weight after 12 weeks at maximal dose
      2. Document BMI and treatment plan at a minimum of every 6 months
   4. Most Obesity Medications are expensive
      1. Most agents are $200 per month
      2. Phentermine and Orlistat are least expensive at $30 and $45/month respectively
      3. Saxenda is most expensive at >$1000/month
4. Management: Medications (most are DEA Controlled agents)
   1. FDA Schedule 4 Medications
      1. Phentermine (Fastin, Adipex-P, Lonamin)
      2. Diethylpropion (Tenuate)
      3. Lorcaserin (Belviq)
   2. FDA Schedule 3 Medications
      1. Benzphetamine (Didrex)
      2. Phendimetrazine (Bontril)
   3. Non-FDA-Scheduled medications
      1. Orlistat (Xenical)
      2. Liraglutide (Saxenda)
5. Management: Combination Protocols
   1. Phentermine and Prozac
      1. Phentermine 30 mg orally daily
      2. Prozac 20 mg orally daily
   2. Phentermine and Topiramate (Qsymia, previously Qnexa)
      1. See Qysmia
   3. Bupropion and Naltrexone
      1. Contrave (90 mg Bupropion with 8 mg Naltrexone) tablet orally daily, gradually advanced to 2 tablets twice daily
6. Management: Dietary Supplements
   1. See Dietary Supplements in Obesity
   2. Patients on Orlistat should take a daily MVI with the fat soluble Vitamins (Vitamin A, Vitamin D, Vitamin E and Vitamin K)
7. Preparations
   1. Qsymia (Phentermine and Topiramate)
      1. Results in 19-20 pound weight loss more than Placebo at 1 year
      2. May cause decreased cognition, Paresthesias, Tachycardia (intolerable in 8%)
      3. Must be tapered gradually (due to risk of Seizure)
      4. Significant Teratogenicity risk (requires Informed Consent, reliable Contraception and monitoring with UPT)
   2. Saxenda (Liraglutide 3 mg/day)
      1. Incretin Mimetic (GLP-1 Analog) used in Type II Diabetes Mellitus
         1. Titrated to 3 mg (instead of the 1.8 mg used in Type II Diabetes Mellitus alone)
      2. Results in 10-12 pound weight loss more than Placebo in one year
      3. May cause Nausea and rare Hypoglycemia (intolerable in 5%)
      4. Most expensive Obesity Medication (>$1000/month)
   3. Contrave (Bupropion and Naltrexone)
      1. Results in 9 to 10.8 lb (up to 4.9 kg) weight loss more than Placebo in one year
      2. May cause Nausea (intolerable in 12%)
      3. Contraindicated with concurrent Opioids, or Seizure disorder, Uncontrolled Hypertension
      4. Suicidality risk (FDA black box warning)
   4. Lorcaserin (Belviq or Belviq XR)
      1. Results in 7-8 pound weight loss more than Placebo in one year
      2. May cause Dizziness, Fatigue (intolerable in 2%)
      3. Risk of Serotonin Syndrome when combined with other serotinergic agents (e.g. SSRI)
      4. Theoretical risk of valvulopathy (similar to Fenfluramine), but short-term studies demonstrated safety
   5. Orlistat (Xenical, Alli)
      1. Typically recommended as a first-line agent among the Obesity Medications
      2. Results in 7 pound weight loss more than Placebo in one year
      3. May cause Nausea, Diarrhea, fecal urgency (intolerable in 4%)
      4. Contraindicated in cholestasis, comorbidity causing malabsorption
      5. One of the least expensive of the Obesity Medications ($45/month)
      6. Package insert recommends taking MVI with fat soluble Vitamins (Vitamins A, D, E and K)
   6. Bupropion (Wellbutrin)
      1. Results in 6 pound weight loss more than Placebo in one year
   7. Phentermine (Fastin, Lonamin, Lomira)
      1. Results in 5 pound weight loss more than Placebo in one year
      2. May cause agitation or Insomnia (intolerable in 11%)
      3. Contraindicated in heart disease or Uncontrolled Hypertension
   8. References
      1. (2015) Presc Lett 22(5): 26
      2. (2015) Presc Lett 22(2): 7-8
      3. (2014) Presc Lett 21(11): 62
8. Contraindications: Noradrenergic agents (all agents other than Orlistat)
   1. Hypertension
   2. Advanced cardiovascular disease
      1. Coronary Artery Disease
      2. Congestive Heart Failure
      3. Arrhythmias
   3. Hyperthyroidism
   4. Narrow-Angle Glaucoma
   5. Substance Abuse history
9. Drug Interactions
   1. Orlistat
      1. Cyclosporine
      2. Fat soluble Vitamins (see above)
   2. Serotonin Syndrome risk
      1. Lorcaserin (Belviq) when combined with other serotonergic agents
   3. Noradrenergic agents (all except Orlistat)
      1. MAO inhibitors
      2. Guanethidine
      3. Tricyclic Antidepressants
      4. Alcohol
      5. Centrally acting stimulants or Anorexiants
10. Adjunctive Therapies
    1. Ursodeoxycholic Acid 600mg qd
       1. Prevention of Gallstones in dieting obese patients
       2. Reference
          1. Shiffman (1995) Ann Intern Med 122:899-905 [PubMed]
11. Preparations: Pharmacologic Therapies recalled by FDA for CV effects
    1. Fenfluramine
    2. Dexfenfluramine
    3. Sibutramine (Meridia)
    4. Phenylpropanolamine (over-the-counter)
       1. Decongestant that stimulates Adrenergic Receptors
       2. Elevates Blood Pressure
12. Preparations: Research Drugs (not approved)
    1. Selective Cannabinoid Type I Blocker
       1. Acomplia (Rimonabant) is first in class
       2. Decreases appetite by blocking cannabinoid receptors
       3. May also be effective in Tobacco Cessation
       4. Fernandez (2004) Curr Opin Investig Drugs 5:430-5 [PubMed]
    2. Growth Hormone
       1. No change in body weight
       2. Decreases Body fat 9.2%
       3. Decreased visceral fat 18%
       4. Johanssen (1997) J Clin Endocrinol Metab 82: 727 [PubMed]
13. References
    1. (1998) AOA Treatment Adult Obesity, 2nd edition
    2. Erlandson (2016) Am Fam Physician 94(5): 361-8 [PubMed]
    3. Frank (1998) J Am Diet Assoc 98:S44-48 [PubMed]
    4. Lyznicki (2001) Am Fam Physician 63(11):2185-96 [PubMed]
    5. Apovian (2015) J Clin Endocrinol Metab 100(2):342–362 [PubMed]
    6. Rippe (1998) J Am Diet Assoc 98:S9-15 [PubMed]
    7. Speer (1997) Phys Sportsmed 25:94-107 [PubMed]
    8. Yanovski (2002) N Engl J Med 346:593 [PubMed]