April 30, 2017
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"A US Food and Drug Administration (FDA) advisory panel voted 15 to 5 Tuesday, recommending that the combination of an analgesic with antacids is not "a rational combination for over-the-counter (OTC) use for the relief of minor aches and pains as"...



(diclofenac) Capsules, for Oral Use



Cardiovascular Thrombotic Events

  • Nonsteroidal anti-inflammatory drugs (NSAIDs) cause an increased risk of serious cardiovascular thrombotic events, including myocardial infarction and stroke, which can be fatal. This risk may occur early in treatment and may increase with duration of use [see WARNINGS AND PRECAUTIONS].
  • ZORVOLEX is contraindicated in the setting of coronary artery bypass graft (CABG) surgery [see CONTRAINDICATIONS and WARNINGS AND PRECAUTIONS].

Gastrointestinal Bleeding, Ulceration, and Perforation

  • NSAIDs cause an increased risk of serious gastrointestinal (GI) adverse events including bleeding, ulceration, and perforation of the stomach or intestines, which can be fatal. These events can occur at any time during use and without warning symptoms. Elderly patients and patients with a prior history of peptic ulcer disease and/or GI bleeding are at greater risk for serious GI events [see WARNINGS AND PRECAUTIONS].


ZORVOLEX (diclofenac) capsules are a nonsteroidal anti-inflammatory drug, available as hard gelatin capsules of 18 mg and 35 mg for oral administration. The chemical name is 2- [(2, 6-dichlorophenyl) amino] benzeneacetic acid. The molecular weight is 296.15. Its molecular formula is C14H11Cl2NO2,and it has the following chemical structure.

ZORVOLEX (diclofenac) Structural Formula Illustration

Diclofenac acid is a white to slight yellowish crystalline powder. Diclofenac acid has a pKa of 4.18 and a logP of 3.03. It is practically insoluble in water and sparingly soluble in ethanol.

The inactive ingredients in ZORVOLEX include a combination of lactose monohydrate, sodium lauryl sulfate, microcrystalline cellulose, croscarmellose sodium and sodium stearyl fumarate. The capsule shells contain gelatin, titanium dioxide, and dyes FD&C blue #1, FD&C blue #2, FDA/E172 Yellow Iron Oxide and FDA/E172 Black Iron Oxide. The imprinting on the gelatin capsules is white edible ink. The 18 mg capsules have a blue body imprinted with IP-203 and light green cap imprinted with 18 mg in white ink. The 35 mg capsules have a blue body imprinted with IP-204 and green cap imprinted with 35 mg in white ink.

Last reviewed on RxList: 5/23/2016
This monograph has been modified to include the generic and brand name in many instances.

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