Victoza Vs. Qsymia: Drug Comparison

Victoza^® (liraglutide) is an injectable medication used to improve blood sugar control in adults and children aged 10 years and older with type 2 diabetes. It works as a glucagon-like peptide-1 (GLP-1) receptor agonist, enhancing insulin secretion, inhibiting glucagon release, and slowing gastric emptying to lower blood sugar levels. Victoza is also indicated to reduce the risk of major adverse cardiovascular events, such as heart attack, stroke, and cardiovascular death,] in adults with type 2 diabetes and established cardiovascular disease. Common side effects include nausea, diarrhea, and headache. It should be used with caution in patients with a history of pancreatitis​.

Qsymia^® (phentermine and topiramate) is a prescription medication used for chronic weight management in adults with obesity or overweight with at least one weight-related condition, such as hypertension, type 2 diabetes, or high cholesterol. It combines two active ingredients: phentermine, an appetite suppressant, and topiramate, which induces a feeling of fullness and reduces appetite. Qsymia is intended to be used alongside a reduced-calorie diet and increased physical activity. Common side effects include dry mouth, constipation, and tingling sensations in the hands and feet. It should be used with caution due to potential risks such as mood changes, increased heart rate, and birth defects if taken during pregnancy.

Glucagon-like peptide-1 (GLP-1) receptor agonist

Phentermine: sympathomimetic amine anorectic

Topiramate: anticonvulsant

Victoza (liraglutide) is indicated:

• As an adjunct to diet and exercise to improve glycemic control in adults and pediatric patients aged 10 years and older with type 2 diabetes mellitus

• To reduce the risk of major adverse cardiovascular events in adults with type 2 diabetes mellitus and established cardiovascular disease

Qsymia (phentermine and topiramate) is indicated:

• As an adjunct to a reduced-calorie diet and increased physical activity for chronic weight management in:

  • Adults with an initial body mass index (BMI) of:

    • 30 kg/m² or greater (obese) or

    • 27 kg/m² or greater (overweight) in the presence of at least one weight-related comorbidity such as hypertension, type 2 diabetes mellitus, or dyslipidemia

  • Pediatric patients aged 12 years and older with BMI in the 95th percentile or greater standardized for age and sex

• Typically taken as an injection once daily

• Comes in single-patient-use pens that deliver 0.6 mg, 1.2 mg, or 1.8 mg per injection

• Typically taken orally once daily

• Comes in 3.75 mg/23 mg, 7.5 mg/46 mg, 11.25 mg/69 mg, and 15 mg/92 mg extended-release capsules

Most common adverse reactions (incidence ≥5%) in clinical trials are:

• Nausea

• Diarrhea

• Vomiting

• Decreased appetite

• Indigestion

• Constipation

Immunogenicity-related events, including hives, were more common among Victoza-treated patients (0.8%) than among comparator-treated patients (0.4%) in clinical trials

Most common adverse reactions in adults (incidence ≥5% and at least 1.5 times placebo) are:

• Tingling sensation

• Dizziness

• Altered taste

• Insomnia

• Constipation

• Dry mouth

Most common adverse reactions in pediatric patients aged 12 years and older (incidence ≥4% and greater than placebo) are:

• Depression

• Dizziness

• Joint pain

• Fever

• Influenza

• Ligament sprain

• Patients with a personal or family history of medullary thyroid carcinoma or in patients with multiple endocrine neoplasia syndrome type 2

• Patients with a serious hypersensitivity reaction to liraglutide or any of the excipients in Victoza

• Drug interactions: Victoza delays gastric emptying and may impact absorption of concomitantly administered oral medications

• Pregnancy

• Glaucoma

• Hyperthyroidism

• Taking or within 14 days of stopping monoamine oxidase inhibitors

• Known hypersensitivity to any component of Qsymia or idiosyncrasy to sympathomimetic amines

• Drug interactions: Oral contraceptives, central nervous system (CNS) depressants including alcohol, non-potassium sparing diuretics

• Pancreatitis

• Never share a Victoza pen between patients, even if the needle is changed

• Low blood sugar: Adult patients taking an insulin secretagogue or insulin may have an increased risk of low blood sugar, including severe low blood sugar

• Acute kidney injury

• Hypersensitivity reactions

• Acute gallbladder disease

• Pregnancy: Victoza should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus

• Embryo-fetal toxicity: Can cause fetal harm

• Increase in heart rate

• Suicidal behavior and ideation

• Risk of ophthalmologic adverse reactions

• Mood and sleep disorders

• Cognitive impairment: May cause disturbances in attention or memory, or speech/language problems

• Slowing of linear growth

• Metabolic acidosis

• Decrease in renal function

• Serious skin reactions

• Breastfeeding: Breastfeeding not recommended

WARNING: RISK OF THYROID C-CELL TUMORS

Liraglutide causes thyroid C-cell tumors at clinically relevant exposures in both genders of rats and mice. It is unknown whether Victoza causes thyroid C-cell tumors, including medullary thyroid carcinoma (MTC), in humans, as the human relevance of liraglutide-induced rodent thyroid C-cell tumors has not been determined.

Victoza is contraindicated in patients with a personal or family history of MTC or in patients with multiple endocrine neoplasia syndrome type 2 (MEN 2). Counsel patients regarding the potential risk of MTC and the symptoms of thyroid tumors.

*This information is from the label for brand name Victoza^®. See the Full Prescribing Information for more complete information. Liraglutide, the active ingredient in Victoza, may also be the active ingredient in other medications, and this information may not be accurate for all medications that include the active ingredient liraglutide.

*This information is from the label for brand name Qsymia^®. See the Full Prescribing Information for more complete information.