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. 2021 Aug 15;11(4):504–529.

Table 4.

Weight loss medications

Generic drug Drug dosage Average weight loss Side effects Dea schedule
Pancreatic lipase inhibitor
    Orlistat 120 mg tid before meal 3.4 KG Steatorrhea, flatulence, fecal discharge Not scheduled
    Orlistat 60 mg tid before meal 2.5 KG Steatorrhea, flatulence, fecal discharge Not scheduled
Seotonin receptor agonist
    Lorcaserin 10 mg bid for 12 months 3.2 KG Headache, nausea, blurred vision, hypoglycemia Schedule IV
Phentermine-topiramate
    Phentermine-topiramate 3.75/23 mg, 7.5/46 mg, 15/92 mg for 12 months 6.7-8.9 KG Insomnia, confusion, dry mouth, nausea, paresthesias Schedule IV
Adrenergic drugs
    Diethlypropion 25 mg tid or 75 mg in am for <12 weeks 3 KG Insomnia, headache, nausea Schedule IV
    Phentermine 15-30 mg/day for <12 weeks 3.6 KG Headache, dry mouth, itching Schedule IV
    Benzphetamine 25-50 mg tid for <12 weeks 3-4 KG Insomina, dizziness, hyperactivity Schedule III
    Phendimetrazine 17.5-70 mg tid for <12 weeks 3.8 KG Dizziness, flushing, sweating Schedule III
Glucagon like peptide analogs
    Liraglutide 0.6-3.0 mg sq <12 months 5.85 KG Pancreatitis, hypoglycemia, nausea, vomiting, fatigue, contraindicated in medullary thyroid cancer Not scheduled
    Semaglutide 1 to 2.4 mg sq weekly for ≥20 weeks Nausea, diarrhea, vomiting, constipation, abdominal pain, headache, fatigue, dyspepsia, dizziness, abdominal distension, eructation, flatulence, gastroenteritis and gastroesophageal reflux disease Not scheduled
Opioid receptor antagonist-adrenergic reuptake inhibitor
    Naltrexone-bupropion 8/90-16/180 mg bid<12 months 2.0-4 KG Mood changes, blurred vision, dry mouth, constipation, seizures Not scheduled

This table contains weight loss medications currently available. Full drug information should be carefully reviewed with and individualized for each patient prior to prescription and administration. Weight loss medication should not be administered to pregnant females or females who breast feed their infants. Liraglutide or Semaglutide should not be prescribed in individuals with medullary thyroid cancer or family history of medullary thyroid cancer. The effect of weight loss medications on cardiovascular morbidity and mortality has not been definitively established. MEN2 = Multiple Endocrine Neoplasia syndrome type 2.