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Understand Why One of the Most Used Anti-Inflammatories in Brazil Is at the Center of a Global Wave of Bans and Restrictions Following Cases of Severe Side Effects in Different Countries. Discover the Reasons Behind This International Debate.
Nimesulide, one of the best-selling anti-inflammatories in Brazil, is at the center of a global controversy due to its potential to cause severe liver damage.
Although widely used in the country, it is banned in at least 12 nations, including Spain, Ireland, Belgium, and Canada.
The main reason? The risks of nimesulide to liver health, which prompted bans following evidence of fulminant hepatitis related to its use.
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How Nimesulide Works in the Body
The discussion gained prominence on social media after a video from the scientific channel Hello, Science!, presented by biomedical Lucas Zanandrez, went viral explaining, based on scientific studies and official documents, why nimesulide is banned in several countries.
Classified as a non-steroidal anti-inflammatory drug (NSAID), nimesulide works by blocking enzymes responsible for the production of prostaglandins — molecules that trigger pain, fever, and inflammation.
This action has made it popular in cases such as menstrual cramps, sore throats, mild inflammation, and even chronic diseases like rheumatoid arthritis.
Unlike other NSAIDs such as ibuprofen and diclofenac, it was designed to cause less stomach irritation. However, what was supposed to be a positive attribute raised more serious concerns: its metabolism in the liver has been associated with rare but potentially fatal adverse reactions.
Why Was Nimesulide Banned in Other Countries?
Since its launch in the 1980s, nimesulide banned has undergone evaluations in various countries.
The highest alert occurred in 2007, when nine patients in Ireland developed fulminant hepatitis after using the medication. Three died, and the others needed urgent liver transplants.
This episode led the Irish Medicines Board to suspend the sale of the drug and opened an investigation conducted by the European Medicines Agency (EMA).
The result? Although the benefits in acute cases were recognized, the EMA recommended use be restricted to a maximum of 15 days and under strict medical supervision.
Still, several countries decided to remove nimesulide banned from their markets, including Sweden, Finland, Denmark, Belgium, Japan, Canada, and the United States — where it was never approved.
Scientific Data on the Risks of Nimesulide
Studies indicate that the risk of liver damage associated with nimesulide is higher than that of other anti-inflammatories.
An international pharmacovigilance survey revealed one case of liver damage for every 26 million tablets sold, a figure higher than those for drugs such as ibuprofen or paracetamol.
In an article published in the journal British Journal of Clinical Pharmacology (BJCP), Italian researchers found that prolonged use of nimesulide for more than 30 days significantly increased the chance of hospitalization due to liver damage.
Additionally, the risks of nimesulide can manifest even with therapeutic doses, especially in people with genetic predispositions or pre-existing liver diseases.
What Is Anvisa’s Position on Nimesulide?
The National Health Surveillance Agency (Anvisa) maintains nimesulide approved in Brazil, but with restrictions.
The medication has a red label, requiring a medical prescription and indicating potential health risks. The package insert recommends use at the lowest possible dose, for a maximum of 15 days, and only under the guidance of a healthcare professional.
There is currently no recent public statement from Anvisa regarding the risk of fulminant hepatitis related to the medication.
How to Recognize Warning Signs When Using Nimesulide?
Among the main symptoms of liver toxicity are:
- Nausea and vomiting
- Severe abdominal pain
- Dark urine
- Yellowing of the skin and eyes (jaundice)
- Extreme fatigue
In light of these signs, the recommendation is to seek immediate medical attention, as they may indicate the onset of drug-induced hepatitis.
What Alternatives to Nimesulide Are Safer?
For mild to moderate pain and inflammation, alternatives such as paracetamol, ibuprofen, and naproxen have better-established safety profiles, as long as they are used correctly and with medical supervision.
No medication is free of risks — especially for the liver — but the risks of nimesulide are statistically more significant with prolonged use.
Should Nimesulide Remain Approved in Brazil?
The decision to keep nimesulide approved in the country seems to balance benefits and risks, as long as its use is guided by a professional.
However, the common pattern of self-medication in Brazil exacerbates the dangers associated with this medication.
The existence of nimesulide banned in so many countries reinforces the need for caution, transparency, and, above all, public health education.
Being informed and following medical prescriptions are the best ways to protect the body from avoidable adverse effects.
Did you know that nimesulide is banned in so many countries? Do you believe it should also be banned in Brazil? Leave your opinion in the comments!
Este remédio e um dos que nunca tomarei. Aqui no Brasil existem muitas outras opções mais saudáveis.