Weight loss is a challenging undertaking — particularly when pursued rapidly without sustainable methods. Historically, many pharmaceutical approaches have been attempted, from drugs targeting the energy-generating part of the cell (e.g. 2,4-DNP) to appetite-suppressing drugs known as anorectics (e.g. amphetamines) in the mid-1900s. Many were withdrawn due to safety concerns.

Contemporary anti-obesity medications include safer alternatives such as orlistat, naltrexone/bupropion combinations and GLP-1 mimetics like semaglutide.

Food–drug interactions

Foods can interact with medications by producing effects that are similar or opposite to those of the drug. Things to keep in mind:

  • Blood sugar management. GLP-1 medications can lower blood sugar — caution is needed if you also use insulin or other antidiabetic drugs.
  • Pancreatitis risk. Excessive alcohol consumption poses serious risks combined with these medications.
  • Gastrointestinal side effects. Nausea, vomiting, diarrhoea and constipation are common, especially during titration.

Dietary recommendations

For nausea

  • Avoid greasy, sugary and fried foods
  • Choose plainer, low-fat options
  • Sip liquids regularly
  • Eat smaller portions, slowly
  • Consider ginger tea or peppermint tea

For constipation

  • Drink plenty of fluids
  • Eat high-fibre foods — whole grains, fruits like bananas and prunes, vegetables
  • Consider over-the-counter laxatives or stool softeners if needed

For diarrhoea

  • Maintain hydration
  • Eat soluble-fibre foods
  • Avoid caffeine and dairy
  • Use over-the-counter remedies as appropriate

A general approach

A healthy lifestyle and diet — one rich in physical activity, whole foods, and a variety of fruits and vegetables in moderation, while reducing or avoiding highly processed foods high in sugar, salt and saturated fats — is the foundation that medication builds on.

Always consult a healthcare professional before making significant dietary changes or taking new supplements while on a GLP-1.

Conclusion

Medications work best when paired with evidence-based medical advice — from your local healthcare professionals and from a structured programme like Beyondbmi — and with support from health coaches and a strong personal network.

Side effects, supported

Beyondbmi pairs your prescription with dietitian and nursing support to manage symptoms safely.

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References

  1. Dolgin, E. (2012). A history of drugs on the weight list. Nature Medicine, 18(6), 843.
  2. Rodgers, R.J., Tschöp, M.H., Wilding, J.P. (2012). Anti-obesity drugs: past, present and future. Dis Model Mech, 5(5), 621–6.
  3. Müller, T.D., Blüher, M., Tschöp, M.H., DiMarchi, R.D. (2022). Anti-obesity drug discovery: advances and challenges. Nat Rev Drug Discov, 21(3), 201–23.
  4. Drugs.com (2023). 4 Key Ozempic Side Effects to Watch Out For. drugs.com
  5. Williamson, J.M. Ozempic Interactions (Healthline). healthline.com
  6. Wharton, S. et al. (2022). Gastrointestinal tolerability of once-weekly semaglutide 2.4 mg. Diabetes Obes Metab, 24(1), 94–105.
  7. Marshall, H. (2023). All About Saxenda (Healthline). healthline.com
  8. Richa, D.C. (2023). 10 Wegovy side effects and how to manage them (Ro). ro.co