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OtherCommentary

Rebuttal: Should family physicians prescribe medication for obesity?

NO

Elizabeth Shaw
Canadian Family Physician February 2017, 63 (2) e83;
Elizabeth Shaw
Family physician and Professor of Family Medicine at McMaster University in Hamilton, Ont.
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  • For correspondence: shawea@mcmaster.ca
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I have 3 main concerns with regard to the points made in the yes argument.1

First, I am concerned about my opponents’ worry that the weak recommendation from the Canadian Task Force on Preventive Health Care (CTFPHC)2 against pharmacotherapy will dissuade primary care providers from routinely using medication to treat obesity. Considering the state of the evidence (which has not changed, despite Health Canada’s recent approval of liraglutide for obesity), routine use of medication to treat obesity is inappropriate. Based on the GRADE (grading of recommendations, assessment, development, and evaluation) framework, a weak recommendation implies an informed discussion about the benefits and risks of the proposed intervention. Following this discussion, the primary care provider might still prescribe under individual circumstances. It is important to remind readers that the CTFPHC mandate is to “support primary care providers in delivering preventive health care”3 and that none of the guideline authors had any pharmaceutical industry affiliation.

My biggest concern is the reliance on the Endocrine Society clinical practice guideline.4 The strength of their recommendation to use pharmacotherapy for patients who have failed lifestyle management is also weak, but with low-quality evidence. As a reminder, the CTFPHC weak recommendation not to prescribe was based on moderate-quality evidence. In addition, the guideline specifically states “the weight loss effects of these medications are only sustained as long as they are taken” with “gradual weight gain typically occurring when medications are stopped.”4 In contrast to the CTFPHC guideline, 3 of 8 authors on the Endocrine Society guideline (including the principle author) have potential conflicts of interest related to significant association with the pharmaceutical industry.

Finally, an informed discussion implies an understanding of the risks as well as the benefits. There is a lack of information presented concerning the potential risks of medication (particularly liraglutide, for which these might be substantial5,6) and no mention of the lack of long-term efficacy or safety data.

Obesity is a risk factor for chronic disease. We should require a higher benefit-to-risk ratio, particularly in asymptomatic patients, before we use pharmacotherapy to treat what is predominantly a lifestyle condition. This bar has not been met. If we wish to prescribe, let us use an exercise prescription, for which there is evidence to support improved quality of life—one of our main goals in chronic disease management.7

Footnotes

  • La traduction en français de cet article se trouve à www.cfp.ca dans la table des matières du numéro de février 2017 à la page e85.

  • Competing interests

    None declared

  • These rebuttals are responses from the authors of the debates in the February issue (Can Fam Physician 2017;63:102–5 [Eng], 106–9 [Fr]).

  • Copyright© the College of Family Physicians of Canada

References

  1. 1.↵
    1. Bourns L,
    2. Shiau J
    . Should family physicians prescribe medication for obesity? Yes [Debate]. Can Fam Physician 2017;63:102-3. (Eng), 106–7 (Fr).
    OpenUrlFREE Full Text
  2. 2.↵
    1. Brauer P,
    2. Gorber S,
    3. Shaw E,
    4. Singh H,
    5. Bell N,
    6. Shane A,
    7. et al
    . Recommendations for prevention of weight gain and use of behavioural and pharmacologic interventions to manage overweight and obesity in adults in primary care. CMAJ 2015;187(3):184-95.
    OpenUrlFREE Full Text
  3. 3.↵
    1. Canadian Task Force on Preventive Health Care [website]
    . About us. Calgary, AB: Canadian Task Force on Preventive Health Care; 2016. Available from: http://canadiantaskforce.ca/about/. Accessed 2017 Jan 16.
  4. 4.↵
    1. Apovian CM,
    2. Aronne LJ,
    3. Bessesen DH,
    4. McDonnell ME,
    5. Murad MH,
    6. Pagotto U,
    7. et al
    . Pharmacological management of obesity: an Endocrine Society clinical practice guideline. J Clin Endocrinol Metab 2015;100(23):342-62. Epub 2015 Jan 15. Erratum in: J Clin Endocrinol Metab 2015;100(5):2135–6.
    OpenUrlCrossRefPubMed
  5. 5.↵
    1. Weir MA,
    2. Beyea MM,
    3. Gomes T,
    4. Juurlink DN,
    5. Mamdani M,
    6. Blake PG,
    7. et al
    . Orlistat and acute kidney injury: an analysis of 953 patients. Arch Intern Med 2011;171:702-10.
    OpenUrlCrossRefPubMed
  6. 6.↵
    1. Taylor P,
    2. Baglioni P
    . Liraglutide in weight management. N Engl J Med 2015;373(18):1779-82.
    OpenUrl
  7. 7.↵
    1. Lawton BA,
    2. Rose SB,
    3. Elley RC,
    4. Dowell AC,
    5. Fenton A,
    6. Moyes SA
    . Exercise on prescription for women aged 40–74 recruited through primary care: two year randomised controlled trial. BMJ 2008;337:a2509. Erratum in: BMJ 2009;339:b5054.
    OpenUrlAbstract/FREE Full Text
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Canadian Family Physician: 63 (2)
Canadian Family Physician
Vol. 63, Issue 2
1 Feb 2017
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Rebuttal: Should family physicians prescribe medication for obesity?
Elizabeth Shaw
Canadian Family Physician Feb 2017, 63 (2) e83;

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