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Diflunisal (Dolobid): Uses, Side Effects and Dosage

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Prescription (Rx) Boxed warning
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500 mg, 250 mg, 375 mg
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Source: FDA drug labeling via NLM DailyMed · About this document

Patient information: uses, side effects, how to take - Diflunisal

What is the most important information I should know about medicines called Nonsteroidal Anti-Inflammatory Drugs (NSAIDs)?

NSAIDs can cause serious side effects, including:

  • Increased risk of a heart attack or stroke that can lead to death. This risk may happen early in treatment and may increase:
  • with increasing doses of NSAIDs
  • with longer use of NSAIDs

Do not take NSAIDs right before or after a heart surgery called a “coronary artery bypass graft (CABG).”

Avoid taking NSAIDs after a recent heart attack, unless your healthcare provider tells you to. You may have an increased risk of another heart attack if you take NSAIDs after a recent heart attack.

  • Increased risk of bleeding, ulcers, and tears (perforation) of the esophagus (tube leading from the mouth to the stomach), stomach and intestines:
  • anytime during use
  • without warning symptoms
  • that may cause death

The risk of getting an ulcer or bleeding increases with:

  • past history of stomach ulcers, or stomach or intestinal bleeding with use of NSAIDs
  • taking medicines called “corticosteroids”, “anticoagulants”, “SSRIs”, or “SNRIs”
  • increasing doses of NSAIDs
  • longer use of NSAIDs
  • smoking
  • drinking alcohol
  • older age
  • poor health
  • advanced liver disease
  • bleeding problems

NSAIDs should only be used:

  • exactly as prescribed
  • at the lowest dose possible for your treatment
  • for the shortest time needed

What are NSAIDs?NSAIDs are used to treat pain and redness, swelling, and heat (inflammation) from medical conditions such as different types of arthritis, menstrual cramps, and other types of short-term pain.

Who should not take a NSAIDs?

Do not take NSAIDs:

  • if you have had an asthma attack, hives, or other allergic reaction with aspirin or any other NSAIDs.
  • Right before or after heart bypass surgery.

Before taking NSAIDS, tell your healthcare provider about all of your medical conditions, including if you:

  • have liver or kidney problems
  • have high blood pressure
  • have asthma

  • are pregnant or plan to become pregnant. Taking NSAIDs at about 20 weeks of pregnancy or later may harm your unborn baby. If you need to take NSAIDs for more than 2 days when you are between 20 and 30 weeks of pregnancy, your healthcare provider may need to monitor the amount of fluid in your womb around your baby. You should not take NSAIDs after about 30 weeks of pregnancy.

  • are breastfeeding or plan to breast feed.

Tell your healthcare provider about all of the medicines you take, including prescription or over-the-counter medicines, vitamins or herbal supplements. NSAIDs and some other medicines can interact with each other and cause serious side effects. Do not start taking any new medicine without talking to your healthcare provider first.

What are the possible side effects of NSAIDs?

NSAIDs can cause serious side effects, including:

See “What is the most important information I should know about medicines called Nonsteroidal Anti-inflammatory Drugs (NSAIDs)?

  • new or worse high blood pressure
  • heart failure
  • liver problems including liver failure
  • kidney problems including kidney failure
  • low red blood cells (anemia)
  • life-threatening skin reactions
  • life threatening allergic reactions
  • Other side effects of NSAIDs include: stomach pain, constipation, diarrhea, gas, heartburn, nausea, vomiting, and dizziness.

Get emergency help right away if you get any of the following symptoms:

  • shortness of breath or trouble breathing
  • chest pain
  • weakness in one part or side of your body
  • slurred speech
  • swelling of the face or throat

Stop taking your NSAID and call your healthcare provider right away if you get any of the following symptoms:

  • nausea
  • more tired or weaker than usual
  • diarrhea
  • itching
  • your skin or eyes look yellow
  • indigestion or stomach pain
  • flu-like symptoms
  • vomit blood
  • there is blood in your bowel movement or it is black and sticky like tar
  • unusual weight gain
  • skin rash or blisters with fever
  • swelling of the arms, legs, hands and feet

If you take too much of your NSAID, call your healthcare provider or get medical help right away.

These are not all the possible side effects of NSAIDs. For more information, ask your healthcare provider or pharmacist about NSAIDs.

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or to Avet Pharmaceuticals Inc. at 1.866.901.DRUG (3784).

Other information about NSAIDs

  • Aspirin is an NSAID but it does not increase the chance of a heart attack. Aspirin can cause bleeding in the brain, stomach, and intestines. Aspirin can also cause ulcers in the stomach and intestines.
  • Some NSAIDs are sold in lower doses without a prescription (over-the counter). Talk to your healthcare provider before using over-the-counter NSAIDs for more than 10 days.

General information about the safe and effective use of NSAIDs

Medicines are sometimes prescribed for purposes other than those listed in a Medication Guide. Do not use NSAIDs for a condition for which it was not prescribed. Do not give NSAIDs to other people, even if they have the same symptoms that you have. It may harm them.

If you would like more information about NSAIDs, talk with your healthcare provider. You can ask your pharmacist or healthcare provider for information about NSAIDs that is written for health professionals.

Distributed by:

Avet Pharmaceuticals Inc.

East Brunswick, NJ 08816

1.866.901.DRUG (3784)

This Medication Guide has been approved by the U.S. Food and Drug Administration.

Dispense with Medication Guide available at: www.avetpharma.com.

51U000000287US10

Revised: 07/2024

About this document

Source: FDA drug labeling via NLM DailyMed · Application number: ANDA 202845 · View the label on DailyMed

Revision date stated in the text: July 2024

Found a mistake? Write to us via the contact page.

The information on this site does not replace the advice of a doctor or pharmacist.

Drug information for Diflunisal

Rx or OTC
Prescription (Rx)?
  • This drug is available only with a prescription from a licensed healthcare provider.
  • Rx
Boxed warning Yes – this drug has a boxed warning (also called a black box warning), the strongest warning of the FDA.
Drug class Nonsteroidal Anti-inflammatory Drug
Active ingredient Diflunisal
Dosage form Tablet, film coated
Route Oral
Marketing status listed in the FDA NDC Directory
Company (applicant) HERITAGE PHARMA
FDA approval ANDA 202845Abbreviated New Drug Application (ANDA) – generic drug Approved March 8, 2012
Therapeutic equivalence (TE) code ABCodes starting with A mean the FDA rates the drug therapeutically equivalent to its reference drug (Orange Book).
Generics Dolobid with the same TE code
Manufacturers 6 labelers list this drug on DailyMed
Packages (NDC)
Package
500 mg – 100 in 1 bottle NDC 14539-673-01
500 mg – 500 in 1 bottle NDC 14539-673-05
500 mg – 60 in 1 bottle NDC 14539-673-06
250 mg – 60 in 1 bottle NDC 14539-703-06
375 mg – 60 in 1 bottle NDC 14539-704-06

Source: FDA drug labeling via NLM DailyMed, data as of October 31, 2026. FDA data (DailyMed, Orange Book, Drug Shortages, enforcement reports). Not a substitute for the advice of a doctor or pharmacist.