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Zontivity

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Zontivity

Zontivity Side Effects Center

Medical Editor: John P. Cunha, DO, FACOEP

Zontivity (vorapaxar) is a PAR-1 antagonist, or an anti-platelet medication, used for the reduction of thrombotic cardiovascular events in patients with a history of myocardial infarction (MI) or with peripheral arterial disease (PAD). Common side effects include bleeding and bruising.

The dose is one tablet of Zontivity 2.08 mg orally once daily, with or without food. Zontivity may interact with ketoconazole, itraconazole, posaconazole, clarithromycin, nefazodone, ritonavir, saquinavir, nelfinavir, indinavir, boceprevir, telaprevir, telithromycin, conivaptan, rifampin, carbamazepine, St. John's wort, and phenytoin. Tell your doctor all medications and supplements you use. During pregnancy, Zontivity should be used only if prescribed. It is unknown if this drug passes into breast milk. Consult your doctor before breastfeeding.

Our Zontivity (vorapaxar) Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

What is Prescribing information?

The FDA package insert formatted in easy-to-find categories for health professionals and clinicians.

Zontivity FDA Prescribing Information: Side Effects
(Adverse Reactions)

SIDE EFFECTS

The following serious adverse reaction is also discussed elsewhere in the labeling:

Clinical Trials Experience

Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in clinical practice.

ZONTIVITY was evaluated for safety in 13,186 patients, including 2,187 patients treated for more than 3 years, in the Phase 3 study TRA 2°P TIMI 50 (Thrombin Receptor Antagonist in Secondary Prevention of Atherothrombotic Ischemic Events). The overall study population, patients who had evidence or a history of atherosclerosis involving the coronary (post-MI), cerebral (ischemic stroke), or peripheral vascular (documented history of PAD) systems, was treated once a day with ZONTIVITY (n=13,186) or placebo (n=13,166). Patients randomized to ZONTIVITY received treatment for a median of 2.3 years.

The adverse events in the ZONTIVITY-treated (n=10,059) and placebo-treated (n=10,049) post-MI or PAD patients with no history of stroke or TIA are shown below [see CONTRAINDICATIONS].

Bleeding

GUSTO severe bleeding was defined as fatal, intracranial, or bleeding with hemodynamic compromise requiring intervention; GUSTO moderate bleeding was defined as bleeding requiring transfusion of whole blood or packed red blood cells without hemodynamic compromise. (GUSTO: Global Utilization of Streptokinase and Tissue Plasminogen Activator for Occluded Arteries.)

The results for the bleeding endpoints in the post-MI or PAD patients without a history of stroke or TIA are shown in Table 1. ZONTIVITY increased GUSTO moderate or severe bleeding by 55%.

Table 1: Non-CABG-Related Bleeds in Post-MI or PAD Patients without a History of Stroke or TIA (First Dose to Last Dose + 30 Days) in the TRA 2°P Study

Endpoints Placebo

(n=10,049)
ZONTIVITY

(n=10,059)
Hazard Ratio†,‡
(95% CI)
Patients with events
(%)
K-M %* Patients with events
(%)
K-M %*
GUSTO Bleeding Categories
Severe 82
(0.8%)
1.0% 100
(1.0%)
1.3% 1.24
(0.92 - 1.66)
Moderate or Severe 199
(2.0%)
2.4% 303
(3.0%)
3.7% 1.55
(1.30 - 1.86)
Any GUSTO Bleeding
(Severe/ Moderate/ Mild)
1769
(17.6%)
19.8% 2518
(25.0%)
27.7% 1.52
(1.43 - 1.61)
Fatal Bleeding 14
(0.1%)
0.2% 16
(0.2%)
0.2% 1.15
(0.56 - 2.36)
Intracranial Hemorrhage
(ICH)
31
(0.3%)
0.4% 45
(0.4%)
0.6% 1.46
(0.92-2.31)
Clinically Significant Bleeding† 950
(9.5%)
10.9% 1349
(13.4%)
15.5% 1.47
(1.35 - 1.60)
  Gastrointestinal Bleeding 297
(3.0%)
3.5% 400
(4.0%)
4.7% 1.37
(1.18-1.59)
* K-M estimate at 1,080 days.
† Clinically significant bleeding includes any bleeding requiring medical attention including ICH, or clinically significant overt signs of hemorrhage associated with a drop in hemoglobin (Hgb) of ≥ 3 g/dL (or, when Hgb is not available, an absolute drop in hematocrit (Hct) of ≥ 15% or a fall in Hct of 9 to < 15%).
‡ Hazard ratio is ZONTIVITY group vs. placebo group.

The effects of ZONTIVITY on bleeding were examined in a number of subsets based on demographic and other baseline characteristics. Many of these are shown in Figure 1. Such analyses must be interpreted cautiously, as differences can reflect the play of chance among a large number of analyses.

Figure 1: Subgroup Analyses (GUSTO Moderate or Severe Bleeding) in Post-MI or PAD Patients without a History of Stroke or TIA in the TRA 2°P Study (First Dose to Last Dose + 30 Days)

The effects of ZONTIVITY on bleeding - Illustration

In TRA 2°P, 367 post-MI or PAD patients without a history of stroke or TIA underwent CABG surgery. Study investigators were encouraged not to discontinue treatment with study drug (i.e., ZONTIVITY or placebo) prior to surgery. Approximately 12.3% of patients discontinued ZONTIVITY more than 30 days prior to CABG. The relative risk for GUSTO moderate or severe bleeding was approximately 1.2 on ZONTIVITY vs. placebo.

Bleeding events that occurred on ZONTIVITY were treated in the same manner as for other antiplatelet agents.

Use in Patients with History of Stroke, TIA, or ICH

In the TRA 2°P study, patients with a history of ischemic stroke had a higher rate for ICH on ZONTIVITY than on placebo. ZONTIVITY is contraindicated in patients with a history of stroke, TIA, or ICH [see CONTRAINDICATIONS].

Other Adverse Reactions

Adverse reactions other than bleeding were evaluated in 19,632 patients treated with ZONTIVITY [13,186 patients in the TRA 2°P study and 6,446 patients in the TRA•CER (Thrombin Receptor Antagonist for Clinical Event Reduction in Acute Coronary Syndrome) study]. Adverse events other than bleeding that occurred at a rate that was at least 2% in the ZONTIVITY group and also 10% greater than the rate in the placebo group are shown in Table 2.

Table 2: TRA 2°P / TRA•CER - Percentage of Patients Reporting Non-hemorrhagic Adverse Reactions at a Rate at Least 2% in the ZONTIVITY Group and at Least 10% Greater than Placebo

ZONTIVITY
N=19,632
n (%)
Placebo
N=19,607
n (%)
Anemia 982(5.0) 783(4.0)
Depression 477(2.4) 405(2.1)
Rashes, Eruptions, and Exanthemas 439(2.2) 395(2.0)

The following adverse reactions occurred at a rate less than 2% in the ZONTIVITY group but at least 40% greater than placebo. In descending order of rate in the ZONTIVITY group: iron deficiency, retinopathy or retinal disorder, and diplopia/oculomotor disturbances.

An increased rate of diplopia and related oculomotor disturbances was observed with ZONTIVITY treatment (30 subjects, 0.2%) vs. placebo (10 subjects, 0.06%). While some cases resolved during continued treatment, information on resolution of symptoms was not available for some cases.

Read the entire FDA prescribing information for Zontivity (Vorapaxar Tablets) »

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