Naproxen is an active ingredient belonging to the NSAID class, non-steroidal anti-inflammatory drugs used in the treatment of pain and inflammation, available as an over-the-counter medicine since 1994. Due to its effectiveness and long-lasting action, it is used in numerous conditions, ranging from headaches to muscle and neck pain.
In this article, we take a closer look at this active ingredient, examining how it works, its clinical use, and its main side effects.
What is naproxen and what is it used for?
Naproxen is indicated for the management of pain associated with various types of inflammation:
- muscle and joint pain;
- tendinitis;
- minor injuries;
- menstrual pain (dysmenorrhea);
- treatment of chronic inflammatory conditions, such as rheumatoid arthritis, osteoarthritis, and arthrosis.
In its over-the-counter form, it is also a frequent choice for very common ailments such as tension headaches and neck pain, conditions that often benefit from its ability to reduce inflammation and relax tense muscles.
How does the medicine work?
Naproxen works by inhibiting the COX-1 and COX-2 enzymes, which are involved in the production of prostaglandins, molecules that mediate inflammatory processes and are responsible for pain perception.
By reducing prostaglandin synthesis, the drug decreases inflammation and relieves pain, while also exerting a mild antipyretic effect.
For headaches and neck pain
Naproxen, along with other NSAIDs, is considered an effective option for treating tension headaches, which are often caused by muscle stiffness, poor posture, or stress. Its prolonged action can provide relief for several hours after taking it, reducing the need for repeated doses.
Naproxen is also one of the most widely used treatments for neck pain, particularly in inflammatory or muscle tension forms. It is often prescribed in combination with proton pump inhibitors, controlling gastric pH and preventing the onset of gastrointestinal complications.
When does it take effect?
Naproxen typically begins to take effect within 30–60 minutes after ingestion, with peak effect observed between two and four hours. The analgesic action tends to be prolonged, thanks to its extended half-life, which often allows the effect to last for several hours.
What are the differences between naproxen and ibuprofen?
Although they belong to the same category (NSAIDs), naproxen and ibuprofen have characteristics that can influence the choice of treatment.
- Duration of effect: Naproxen lasts longer (up to 12 hours), while ibuprofen requires more frequent administration.
- Speed of action: Ibuprofen tends to act more quickly, making it useful for sudden pain.
- Type of pain: Ibuprofen is often preferred for mild pain and fever; naproxen for muscle pain, neck pain, and more persistent inflammation.
- Tolerability: Both can cause gastrointestinal adverse effects; ibuprofen is sometimes better tolerated in short-term treatment.
Side effects and contraindications
Like all NSAIDs, naproxen can cause side effects, especially when taken for prolonged periods or at high doses. The most common side effects affect the gastrointestinal tract: nausea, heartburn, and epigastric pain may occur in individuals sensitive to the drug.
Other possible effects include headache, dizziness, or water retention. It is also contraindicated in patients with active ulcers, severe renal or hepatic insufficiency, allergy to NSAIDs, or those taking other anti-inflammatory drugs without careful medical evaluation.
To reduce the risk of side effects, it is essential to follow the dosages indicated by your doctor and carefully evaluate your individual clinical condition.
The distribution of naproxen
Naproxen is commercially available in various immediate-release and delayed-release formulations and under various trade names. Products containing this active ingredient may differ in dosage, excipients, and pharmaceutical form, depending on the therapeutic purpose.
As one of the most widely used NSAIDs, it is a key ingredient in numerous pharmaceutical formulations for the treatment of acute and chronic pain. At Flarer, we guarantee its distribution with high standards of quality, safety, and traceability, offering support to pharmaceutical companies in managing the entire process.
Our team of consultants is available to provide technical assistance, regulatory information, and tailored solutions; contact us to learn more.