PRISTIQ safety information
Important Safety Information
WARNING: SUICIDAL THOUGHTS AND BEHAVIORS
Antidepressants increased the risk of suicidal thoughts and behavior in children, adolescents, and young adults in short-term studies. These studies did not show an increase in the risk of suicidal thoughts and behavior with antidepressant use in patients over age 24; there was a reduction in risk with antidepressant use in patients aged 65 and older.

In patients of all ages who are started on antidepressant therapy, monitor closely for worsening, and for emergence of suicidal thoughts and behaviors. Advise families and caregivers of the need for close observation and communication with the prescriber. PRISTIQ is not approved for use in pediatric patients.

Contraindications
  • PRISTIQ is contraindicated in patients with a known hypersensitivity to PRISTIQ or venlafaxine. Angioedema has been reported in patients treated with PRISTIQ.

  • Serotonin syndrome and MAOIs: Do not use MAOIs intended to treat psychiatric disorders with PRISTIQ or within 7 days of stopping treatment with PRISTIQ. Do not use PRISTIQ within 14 days of stopping an MAOI intended to treat psychiatric disorders. In addition, do not start PRISTIQ in a patient who is being treated with an MAOI such as linezolid or intravenous methylene blue.

Selected Warnings and Precautions
  • All patients treated with antidepressants should be monitored appropriately and observed closely for clinical worsening, suicidality, and unusual changes in behavior, especially during the first few months of treatment and when changing the dose. Consider changing the therapeutic regimen, including possibly discontinuing the medication, in patients whose depression is persistently worse or includes symptoms of anxiety, agitation, panic attacks, insomnia, irritability, hostility, aggressiveness, impulsivity, akathisia, hypomania, mania, or suicidality that are severe, abrupt in onset, or were not part of the patient's presenting symptoms. Families and caregivers of patients being treated with antidepressants should be alerted about the need to monitor patients.

  • The development of a potentially life-threatening serotonin syndrome has been reported with SSRIs and SNRIs, including with PRISTIQ, both when taken alone, but especially when co-administered with other serotonergic agents (including triptans, tricyclic antidepressants, fentanyl, lithium, tramadol, tryptophan, buspirone, and St. John's Wort) and with drugs that impair metabolism of serotonin (in particular, MAOIs, both those intended to treat psychiatric disorders and also others, such as linezolid and intravenous methylene blue). If such events occur, immediately discontinue PRISTIQ and any concomitant serotonergic agents, and initiate supportive treatment. If concomitant use of PRISTIQ with other serotonergic drugs is clinically warranted, patients should be made aware of a potential increased risk for serotonin syndrome, particularly during treatment initiation and dose increase.

  • Patients receiving PRISTIQ should have regular monitoring of blood pressure, since increases in blood pressure were observed in clinical studies. Pre-existing hypertension should be controlled before starting PRISTIQ. Caution should be exercised in treating patients with pre-existing hypertension, cardiovascular or cerebrovascular conditions that might be compromised by increases in blood pressure. Cases of elevated blood pressure requiring immediate treatment have been reported. For patients who experience a sustained increase in blood pressure, either dose reduction or discontinuation should be considered.

  • SSRIs and SNRIs, including PRISTIQ, may increase the risk of bleeding events. Concomitant use of aspirin, NSAIDs, warfarin, and other anticoagulants may add to this risk.

  • The pupillary dilation that occurs following use of many antidepressant drugs including PRISTIQ may trigger an angle closure attack in a patient with anatomically narrow angles (Angle Closure Glaucoma) who does not have a patent iridectomy.

  • PRISTIQ is not approved for use in bipolar depression. Prior to initiating treatment with an antidepressant, patients should be adequately screened to determine the risk of bipolar disorder.

  • PRISTIQ should be used cautiously in patients with a history or family history of mania or hypomania or with a history of seizure disorder.

  • On discontinuation, adverse events, some of which may be serious, have been reported with PRISTIQ and other SSRIs and SNRIs. Abrupt discontinuation of PRISTIQ has been associated with the appearance of new symptoms. Patients should be monitored for symptoms when discontinuing treatment. A gradual reduction in dose rather than abrupt cessation is recommended whenever possible.

  • Hyponatremia may occur as a result of treatment with SSRIs and SNRIs, including PRISTIQ. Discontinuation of PRISTIQ should be considered in patients with symptomatic hyponatremia.

  • Interstitial lung disease and eosinophilic pneumonia associated with venlafaxine (the parent drug of PRISTIQ) therapy have been rarely reported.

Adverse Reactions
  • The most commonly observed adverse reactions in patients taking PRISTIQ vs placebo for MDD in short-term fixed-dose premarketing studies (incidence ≥5% and at least twice the rate of placebo in the 50-mg dose group) were nausea (22% vs 10%), dizziness (13% vs 5%), hyperhidrosis (10% vs 4%), constipation (9% vs 4%), and decreased appetite (5% vs 2%).

Indication
PRISTIQ Extended-Release Tablets are indicated for the treatment of major depressive disorder in adults.





PRISTIQ $4 Co-pay Card Full Terms and Conditions

By participating in the PRISTIQ® (desvenlafaxine) $4 Co-pay Card program, you acknowledge that you currently meet the eligibility criteria and will comply with the terms and conditions described below:

  • The Card is not valid for prescriptions that are eligible to be reimbursed, in whole or in part, by Medicaid, Medicare, or other federal or state healthcare programs including any state prescription drug assistance programs and the Government Health Insurance Plan available in Puerto Rico (formerly known as “La Reforma de Salud”)

  • The Card is not valid for prescriptions that are eligible to be reimbursed by private insurance plans or other health or pharmacy benefit programs, which reimburse you for the entire cost of your prescription drugs

  • You must be 18 or older

  • Eligible patients will pay a minimum of $4 per prescription fill. By using the Card, eligible patients will receive a savings of up to $75 per fill off their co-pay or out-of-pocket costs. The Card is good for a maximum savings of $900 per year ($75 per month x 12 months). The Card limits your prescription cost to $4, subject to a maximum $75 monthly benefit. Thus, if your co-pay or out-of-pocket cost is more than $79, you will save $75 off of your co-pay or total out-of-pocket costs. [Example: If your co-pay or out-of-pocket costs are $100, you will pay $25 ($100-$75=$25).] If your co-pay or out-of-pocket costs are no more than $79, you pay $4. For a mail-order 3-month prescription, your total maximum savings will be $225 ($75x3)

  • You must deduct the savings received under this program from any reimbursement request submitted to your insurance plan, either directly by you or on your behalf

  • Cannot be combined with any other rebate/coupon, free trial, or similar offer for the specified prescription

  • The Card will be accepted only at participating pharmacies

  • The Card is not health insurance

  • This offer is good only in the US and Puerto Rico

  • Not valid where otherwise prohibited by law

  • The Card is limited to 1 per person during this offering period and is not transferable

  • Pfizer reserves the right to rescind, revoke, or amend the program without notice

  • No membership fees

  • The Card and program expire on 12/31/17


References
  1. Thase ME, Kornstein SG, Germain JM, Jiang Q, Guico-Pabia C, Ninan PT. An integrated analysis of the efficacy of desvenlafaxine compared with placebo in patients with major depressive disorder. CNS Spectr. 2009;14(3):144-154.

  2. Rosenthal JZ, Boyer P, Vialet C, Hwang E, Tourian KA. Efficacy and safety of desvenlafaxine 50 mg/d for prevention of relapse in major depressive disorder: a randomized controlled trial. J Clin Psychiatry. 2013;74(2):158-166.

  3. Soares CN, Kornstein SG, Thase ME, Jiang Q, Guico-Pabia CJ. Assessing the efficacy of desvenlafaxine for improving functioning and well-being outcome measures in patients with major depressive disorder: a pooled analysis of 9 double-blind, placebo-controlled, 8-week clinical trials. J Clin Psychiatry. 2009;70(10):1365-1371.

  4. Leon AC, Olfson M, Portera L, Farber L, Sheehan DV. Assessing psychiatric impairment in primary care with the Sheehan Disability Scale. Int J Psychiatry Med. 1997;27(2):93-105.

  5. Data on file. Pfizer Inc, New York, NY.

  6. Hamilton M. A rating scale for depression. J Neurol Neurosurg Psychiatry. 1960;23:56-62.

  7. Sajatovic M, Ramirez LF. Rating Scales in Mental Health. 2nd ed. Hudson, OH: Lexi-Comp; 2003.

  8. Clayton AH, Kornstein SG, Rosas G, Guico-Pabia C, Tourian KA. An integrated analysis of the safety and tolerability of desvenlafaxine compared with placebo in the treatment of major depressive disorder. CNS Spectr. 2009;14(4):183-195.

  9. Clayton A, Reddy S, Focht K, Musgnung J, Fayyad R. An evaluation of sexual functioning in employed outpatients with major depressive disorder treated with desvenlafaxine 50 mg or placebo. J Sex Med. 2013;10(3):768-776.

  10. Dunlop BW, Reddy S, Yang L. Symptomatic and functional improvement in employed depressed patients: a double‐blind clinical trial of desvenlafaxine versus placebo. J Clin Psychopharmacol. 2011;31:569‐576.

  11. McGahuey CA, Gelenberg AJ, Laukes CA, et al. The Arizona Sexual Experience Scale (ASEX): reliability and validity. J Sex Marital Ther. 2000;26(1):25-40.

  12. Preskorn SH, Nichols AI, Paul J, Patroneva AL, Helzner EC, Guico-Pabia CJ. Effect of desvenlafaxine on the cytochrome P450 2D6 enzyme system. J Psychiatr Pract. 2008;14(6):368-378.

  13. Nichols AI, Focht K, Jiang Q, Preskorn SH, Kane CP. Pharmacokinetics of venlafaxine extended release 75 mg and desvenlafaxine 50 mg in healthy CYP2D6 extensive and poor metabolizers: a randomized, open-label, two-period, parallel-group, crossover study. Clin Drug lnvestig. 2011;31(3):155-167.

Tolerability

PRISTIQ 50 mg tolerability is comparable to placebo across several indicators8-10

Summary

Low discontinuation rates in a pooled analysis of 8-week studies
PRISTIQ 50 mg 4.1% vs 3.8% Placebo
Low incidence of sexual dysfunction across 8-week studies
PRISTIQ 50 mg 1% vs 0% Placebo
No clinical difference in weight gain in 8-week studies
PRISTIQ 50 mg -0.97 lb vs -0.07 lb Placebo
There are serious risks associated with PRISTIQ. For more details, please see the BOXED WARNING and Important Safety Information.

Discontinuation Rate

PRISTIQ 50 mg showed low discontinuation rates in a pooled analysis of 8-week studies
  • Low discontinuation rates in a pooled analysis of 8-week studies 
    PRISTIQ 50 mg 4.1% vs 3.8% Placebo
8-week study description
Pooled 50 mg data (n=317) vs placebo (n=636) from five double-blind, randomized, placebo-controlled, fixed-dose, 8-week studies of 50 mg, 100 mg, 200 mg, and 400 mg qd of PRISTIQ in adults aged 18 or older with MDD (N=2001).8 The primary end point was the change in HAM-D17 total score vs placebo from baseline at week 8.1 Sexual function adverse reactions were recorded throughout the study for patients on placebo and PRISTIQ 50 mg.1,8

Sexual Function

Study description9,11
Sexual Dysfunction
12-week study
Data from a double-blind, randomized, placebo-controlled, fixed-dose, 12-week study of PRISTIQ 50 mg qd (n=281) vs placebo (n=141) in adults aged 18 or older with MDD. The primary end point was the change in HAM-D17 total score vs placebo from baseline at week 12. The key secondary end point was SDS total score at week 12. Recording of sexual function was completed using the ASEX questionnaire at prespecified time points of baseline, 4, 8, and 12 weeks for patients on placebo and PRISTIQ 50 mg. Although the ASEX analysis was part of the a priori statistical plan, the study was not specifically powered to evaluate changes in sexual function.9,11 Observed cases analysis.
PRISTIQ 50 mg showed low incidence of sexual dysfunction across 8-week studies
8-week study description
Pooled 50 mg data (n=317) vs placebo (n=636) from five double-blind, randomized, placebo-controlled, fixed-dose, 8-week studies of 50 mg, 100 mg, 200 mg, and 400 mg qd of PRISTIQ in adults aged 18 or older with MDD (N=2001). The primary end point was the change in HAM-D17 total score vs placebo from baseline at week 8. Sexual function adverse reactions were recorded throughout the study for patients on placebo and PRISTIQ 50 mg.8

Weight

Study description
Weight Gain
In a separate 12-week study10
  • The mean weight changes* from baseline in patients with PRISTIQ 50 mg and placebo were -0.18 lb and 0.09 lb, respectively
  • The rates of clinically significant weight gain reported in patients with PRISTIQ 50 mg and placebo were 1.4% and 2.1%, respectively
  • Additionally, the rates of clinically significant weight loss reported in patients with PRISTIQ 50 mg and placebo were 1.4% and 1.4%, respectively
12-week study
Data from a double-blind, randomized, placebo-controlled, fixed-dose, 12-week study of PRISTIQ 50 mg qd (n=282) vs placebo (n=141) in adults aged 18 or older with MDD. The primary end point was the change in HAM-D17 total score vs placebo from baseline at week 12. Weight gain was measured at prespecified time points during the course of these studies. Statistical significance was calculated vs placebo (P>0.05) based on change from baseline to end point; observed cases analysis.5,10
*Weight change was measured at prespecified time points during the course of these studies; observed cases analysis.10
Clinically significant weight gain or loss was defined as an increase or decrease of 7% from baseline.10
In a pooled analysis of 8-week studies,
PRISTIQ 50 mg—Weight change vs placebo
  • No clinical difference in weight gain in 8-week studies 
    PRISTIQ 50 mg -0.97 lb vs -0.07 lb Placebo
8-week study description
Pooled 50 mg data (n=308) vs placebo (n=623) from five double-blind, randomized, placebo-controlled, fixed-dose, 8-week studies of 50 mg, 100 mg, 200 mg, and 400 mg qd of PRISTIQ in adults aged 18 or older with MDD (N=2001). The primary end point was the change in HAM-D17 total score vs placebo from baseline at week 8. Weight gain was measured at prespecified time points during the course of these studies. Statistical significance was calculated vs placebo (P<0.05) based on change from baseline to end point; observed cases analysis.5,8 Clinically significant weight change reflects analysis from two pooled studies of PRISTIQ 50 mg (n=308) vs placebo (n=623).5,8

Most Common Adverse Reactions

Most commonly observed adverse reactions
Adverse reactions shown are for patients taking PRISTIQ 50 mg vs placebo in 8-week studies (incidence ≥5% and ≥2x the rate of placebo).