(redirected from Belviq)


(lor-ca-ser-in) ,


(trade name)


Therapeutic: weight control agents
Pharmacologic: serotonin 2c receptor agonists
Pregnancy Category: X


In conjunction with a reduced-calorie diet and increased physical activity for chronic weight management in patients with a body mass index (BMI) of ≥30 kg/m2 or 27 kg/m2 with a weight-related comorbidity (hypertension, type 2 diabetes, dyslipidemia).


Acts as a serotonin 2C receptor agonist; increases satiety by activating 5–HT2C receptors located on anorexigenic neurons in the hypothalmus.

Therapeutic effects

Decreased appetite with subsequent weight loss and health benefits.


Absorption: Well absorbed following oral administration.
Distribution: Enters cerebrospinal fluid and central nervous system.
Metabolism and Excretion: Extensively metabolized by the liver; metabolites are mostly excreted in urine (92.3%), minimal amounts in feces (2.2%).
Half-life: 11 hr.

Time/action profile (weight loss)

POwithin 1 mo6–9 mounknown


Contraindicated in: Obstetric: Pregnancy (weight loss may result in fetal harm); Lactation: Breast feeding is not recommended; Pediatric: Not recommended for children <18 yr;Severe renal impairment/end stage renal disease.
Use Cautiously in: History of priapism or risk of priapism (including sickle-cell anemia, multiple myeloma, leukemia or penile deformity);History of congestive heart failure, bradycardia or heart block greater than first degree;History of suicidal thoughts/behavior;History of type 2 diabetes (weight loss may ↑ risk of hypoglycemia);Concurrent use of drugs metabolized by the CYP2D6 enzyme system;Moderate renal impairment;Severe hepatic impairment; Geriatric: Use should be based on age-related renal impairment.
Exercise Extreme Caution in: Concurrent use of serotoninergic or antidopaminergic agents.

Adverse Reactions/Side Effects

Central nervous system

  • neuroleptic malignant syndrome (life-threatening)
  • serotonin syndrome (life-threatening)
  • cognitive impairment
  • depression
  • dizziness
  • fatigue
  • psychiatric disorders
  • suicidality


  • valvulopathy (life-threatening)
  • bradycardia
  • hypertension
  • peripheral edema


  • constipation
  • dry mouth
  • nausea


  • priapism


  • hypoglycemia
  • ↑ prolactin


  • ↓ RBC count


Drug-Drug interaction

Concurrent use with serotonergic or antidopaminergic medications, including antipsychotics may ↑ risk of serotonin syndrome or neuroleptic malignant syndrome; use extreme caution.Concurrent use with serotonergic/dopaminergic agents that are potent 5–HT2B agonists may ↑ risk of cardiac valvulopathy.May ↑ blood levels and effects of other drugs metabolized by the CYP 2D6 system, including dextromethorphan ; locaserin is an inhibitor of the CYP 2D6 system.


Oral (Adults) 10 mg twice daily; discontinue if 5% weight loss has not been observed at 12 wk.


Tablets: 10 mg

Nursing implications

Nursing assessment

  • Monitor patients for weight loss and adjust concurrent medications (antihypertensives, antidiabetics, lipid-lowering agents) as needed.
  • Assess for serotonin syndrome (mental changes [agitation, hallucinations, coma], autonomic instability [tachycardia, labile BP, hyperthermia], neuromuscular aberrations [hyper-reflexia, incoordination], and/or GI symptoms [nausea, vomiting, diarrhea]), especially in patients taking other serotonergic drugs (SSRIs, SNRIs, triptans).
  • Monitor for signs and symptoms of neuroleptic malignant syndrome (hyperthermia, muscle rigidity, autonomic instability with possible rapid fluctuation of vital signs, mental status changes) during therapy.
  • Assess for signs and symptoms of valvular heart disease (dyspnea, dependent edema, CHF, new cardiac murmur) during therapy. If these develop, consider discontinuing lorcaserin.
  • Monitor closely for notable changes in behavior that could indicate the emergence or worsening of suicidal thoughts or behavior or depression. Discontinue lorcaserin if these occur.
  • Monitor for symptoms related to hyperprolactinemia (menstrual abnormalities, galactorrhea, gynecomastia).
  • Lab Test Considerations: Monitor CBC periodically during therapy. May cause leukopenia, lymphopenia, neutropenia, anemia, and ↓ WBC, hemoglobin, and hematocrit.
    • May cause ↑ prolactin levels.
    • Monitor blood sugar closely in patients with diabetes.

Potential Nursing Diagnoses

Disturbed body image (Indications)
Imbalanced nutrition: more than body requirements (Indications)
Deficient knowledge, related to medication regimen (Patient/Family Teaching)


  • Oral: May be administered with or without food.

Patient/Family Teaching

  • Instruct patient to take lorcaserin as directed and not to increase dose.
  • May impair cognitive function. Caution patient to avoid driving or other activities that require alertness until response to medication is known.
  • Advise patient and family to notify health care professional if thoughts about suicide or dying, attempts to commit suicide; new or worse depression; new or worse anxiety; feeling very agitated or restless; panic attacks; trouble sleeping; new or worse irritability; acting aggressive; being angry or violent; acting on dangerous impulses; an extreme increase in activity and talking; other unusual changes in behavior or mood or if symptoms of serotonin syndrome, neuroleptic malignant syndrome, or valvular heart disease occur.
  • Instruct patient to notify health care professional of all Rx or OTC medications, vitamins, or herbal products being taken and to consult with health care professional before taking other medications, especially St. John's Wort.
  • Advise patients with diabetes to monitor blood sugar closely during therapy.
  • Inform male patient that priapism may occur. If an erection lasts longer than 4 hrs, whether painful or not, immediately discontinue lorcaserin and seek emergency attention.
  • Advise patient to notify health care professional if pregnancy is planned or suspected or if breast feeding.

Evaluation/Desired Outcomes

  • Decrease in weight and BMI. If 5% of baseline body weight is not lost by Week 12, discontinue lorcaserin, as it is unlikely patient will achieve and sustain clinically meaningful weight loss with continued treatment.
References in periodicals archive ?
75/23-15/92 controlled mg/d substance Capsule CONQUER(25) 56 weeks SEQUEL (26) 108 weeks (52-week extension of CONQUER trial) Lorcaserin Serotonin BLOOM (28) (Belviq, Belviq 52 weeks XR) (27) 5-HT2C receptor agonist BLOSSOM (29) Schedule IV 52 weeks controlled 10 mg bid or substance 20 mg/d ER Tablet BLOOM-DM (30) 52 weeks Naltrexone SR/- Opioid receptor COR-I (32) bupropion SR antagonist/- 56 weeks (Contrave) (31) dopamine and norepinephrine reuptake inhibitor COR-II (33) 56 weeks 8/90 mg/d-16/ 180 mg bid COR-BMOD (34) 56 weeks Tablet COR-DIABETES (35) 56 weeks Liraglutide GLP-1 receptor SCALE 3 mg agonist Obesity and (Saxenda) (36) Prediabetes (37) 0.
brand name: BELVIQ, "lorcaserin") after the completion of a pre-specified interim safety analysis, evaluating the incidence of Major Adverse Cardiovascular Events (MACE), defined as cardiovascular death, myocardial infarction or stroke.
Lorcaserin has been marketed under the brand name BELVIQ in the United States since June 2013 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/m or greater (obese), or 27 kg/m or greater (overweight) in the presence of at least one weight-related comorbid condition (e.
Lorcaserin, which is marketed as Belviq and was developed under the name Lorqess, changes the chemical signals that affect the sensation of fullness, altering the serotonin system, which affects the brain circuitry that regulates mood, anxiety, hunger and reproductive behavior.
launched Belviq XR (lorcaserin HCl) CIV extended-release 20 mg tablets.
Amitriptyline* Elavil Bupropion * Wellbutrin, Zyban Clomipramine* Anafranil Desipramine* Norpramin Exenatide* Byetta, Bydureon Imipramine* Tofranil Levomilnacipran * Fetzima Liraglutide * Victoza, Saxenda Lorcaserin * Belviq Metformin * Glucophage Methylphenidate * Ritalin, Methylin Mirtazapine* Remeron Naltrexone/bupropion * Contrave Nefazodone * Serzone Nortriptyline* Pamelor Olanzapine* Zyprexa Orlistat* Xenical Paroxetine * Paxil Phentermine/topiramate * Qsymia Pramlintide* Symlin Protriptyline* Vivactil Quetiapine* Seroquel Trazodone * Desyrel, Oleptro Vilazodone* Viibryd Vortioxetine * Trintellix Zonisamide * Zonegran
Eisai and Arena Pharmaceuticals stated that lorcaserin, which is sold under the brand name BELVIQ, is currently approved as an adjunct to a reduced-calorie diet and increased physical activity for chronic weight management in adults who have a body mass index (BMI) of 30 kg/m2 or greater (obese), or BMI of 27 kg/m2 or greater (overweight) with at least one weight-related medical condition, including high blood pressure, high cholesterol, or type 2 diabetes.
The company is also advancing its ralinepag program, including its ongoing Phase II trial for pulmonary arterial hypertension (PAH); its APD371 program through a Phase I ascending dose clinical trial; supporting Eisai to advance the MACE, diabetes conversion, and ongoing BELVIQ (lorcaserin HCl) cardiovascular outcomes trial (CVOT), and seeking potential regulatory approval for BELVIQ XR, a once-daily formulation.
In clinical trials that tested Qsymia and Belviq, between 50 and 62 percent of the study participants lost at least five percent of their weight after taking the medication for one year.
Those drugs are Qsymia, which is sold by Vivus, and Belviq, which is from Arena Pharmaceuticals and Eisai.
NORDIC BUSINESS REPORT-February 13, 2014-Arena Pharmaceuticals submits marketing authorisation application in Brazil for BELVIQ for weight management
Key facts about lorcaserin (Beiviq) and orlistat (Xenical and Alli) Generic name Lorcaserin Orlistat Brand name Belviq Xenical Alli Mechanism Serotonin 2c receptor Reversible inhibitor of gastric of action agonist reduces and pancreatic lipases, appetite resulting in less absorption of dietary fat Dose 10 mg twice daily 120 mg three 60 mg three times daily times daily with with meals; over meals; the counter prescription Commonly Headache, dizziness, Borborygmi, abdominal cramps, reported fatigue, nausea, dry flatus, oily spotting per side effects mouth, and rectum, loose stool, and fecal constipation incontinence