Package Leaflet: Information for thepatient
Naprosyn 500 mg tablets
Naproxen
Read all of this leaflet carefully before you start taking this medicine because it contains important information for you.
Contents of the pack
Naprosyn contains the active substance naproxen, which belongs to a group of medicines called non-steroidal anti-inflammatory drugs (NSAIDs).
Naprosyn is indicated for the treatment of:
It is important that you use the smallest dose that relieves/control your pain and do not take Naprosyn for longer than necessary to control your symptoms.
Do not take Naprosyn
Warnings and precautions
Consult your doctor or pharmacist before starting to take Naprosyn.
Severe skin reactions have been reported with the use of non-steroidal anti-inflammatory drugs, appearing as red patches, generalized skin redness, ulcers, or widespread rash accompanied by symptoms similar to those of the flu, including fever (see section 4). The rash may progress to generalized blisters or skin peeling. The greatest risk of these severe skin reactions is during the first weeks of treatment, but they could start to develop up to several months after taking the medicine (see section 4). If you have developed any of these severe skin reactions with the use of Naprosyn, you should not restart treatment with Naprosyn at any time. If you develop a skin rash or these symptoms, stop taking Naprosyn and contact your doctor or seek medical attention immediately.
Be cautious in the following situations:
Cardiovascular precautions
Medicines like Naprosyn may be associated with a moderate increase in the risk of suffering heart attacks ("myocardial infarctions") or strokes. This risk is more likely to occur when high doses and prolonged treatments are used. Do not exceed the recommended dose or treatment duration.
If you have heart problems, a history of strokes, or think you may be at risk for these conditions (for example, you have high blood pressure, diabetes, high cholesterol, or are a smoker), you should discuss this treatment with your doctor or pharmacist.
Additionally, this type of medicine may cause fluid retention, especially in patients with heart failure and/or high blood pressure (hypertension).
Other medicines and Naprosyn
Tell your doctor or pharmacist if you are taking, have recently taken, or might take any other medicines.
This is very important because Naprosyn may alter the way other medicines work. It is essential that you inform your doctor if you are taking any of the following medicines:
It may be necessary for your doctor to modify the dose of one of the two medicines. Consult your doctor if you have any doubts about these points.
Taking Naprosyn with food and drinks
It is recommended to take the tablets during meals or immediately after eating to reduce the possibility of stomach discomfort.
Pregnancy, breastfeeding, and fertility
If you are pregnant or breastfeeding, think you may be pregnant, or plan to become pregnant, consult your doctor or pharmacist before using this medicine.
Naprosyn should not be administered during pregnancy, childbirth, or during breastfeeding.
Do not take Naprosyn if you are in the last 3 months of pregnancy, as it may harm the fetus or cause problems during delivery. It may cause kidney and heart problems in your fetus. It may affect your and your baby's tendency to bleed and delay or prolong delivery more than expected.
Because the administration of medicines of the Naprosyn type has been associated with an increased risk of congenital anomalies/abortions, you should not take Naprosyn during the first and second trimester of pregnancy unless it is strictly necessary and indicated by your doctor. If you need treatment during this period or while trying to become pregnant, you should take the minimum dose for the shortest possible time. From the 20th week of pregnancy, Naprosyn may cause kidney problems in your fetus if taken for more than a few days, which can cause low levels of the amniotic fluid surrounding the baby (oligohydramnios). If you need treatment for more than a few days, your doctor may recommend additional checks.
For women of childbearing age, it should be noted that medicines of the Naprosyn type have been associated with a decrease in fertility.
Driving and using machines
Naprosyn should be used with caution in patients whose activity requires attention and who have observed dizziness or visual disturbances during treatment with this medicine.
Naprosyn contains sodium
This medicine contains less than 1 mmol of sodium (23 mg) per dose; that is, it is essentially "sodium-free".
Follow exactly the administration instructions of this medicine indicated by your doctor or pharmacist. If in doubt, consult your doctor or pharmacist again.
Your doctor will indicate the duration of your treatment with Naprosyn.
The recommended dose is:
Adults
The daily dose is usually 1 or 2 tablets (500 mg or 1000 mg of naproxen). As an initial dose, it is recommended to administer 1 tablet (500 mg of naproxen) followed by half a tablet (250 mg of naproxen) every 6 or 8 hours, depending on the intensity of the process. These doses may be modified by your doctor.
For the treatment of rheumatoid arthritis, osteoarthritis, and ankylosing spondylitis: the initial dose is usually 1 tablet (500 mg of naproxen) taken twice a day (morning and night) or 2 tablets (1000 mg of naproxen) taken once a day.
For the treatment of acute gout episodes: the initial dose is usually 1 and a half tablets (750 mg of naproxen) followed by half a tablet (250 mg of naproxen) every 8 hours until the pain subsides. Consult your doctor about the duration of treatment.
For the treatment of dysmenorrhea(menstrual pain): the initial dose is usually 1 tablet (500 mg of naproxen) followed by half a tablet (250 mg of naproxen) every 6 or 8 hours.
For the treatment of migraineattacks: the initial dose is 1 and a half tablets (750 mg of naproxen) when the first symptoms appear, followed by half a tablet (250 mg of naproxen) after half an hour of the initial intake.
For the treatment of menorrhagia(pain associated with excessive menstrual bleeding): the initial dose on the first day of menstruation is between 1 and a half and 2 and a half tablets (750 mg and 1250 mg of naproxen) divided into two daily doses. Continue with a dose of 1 or 2 tablets per day (500 mg or 1000 mg of naproxen) divided into two daily doses for a maximum of 4 days.
Use in patients over 65 years old or with kidney and/or liver disease
In patients over 65 years old or if you suffer from kidneyor liverdisease, it is recommended to reduce the dose and use the smallest effective dose for the shortest possible time. Consult your doctor.
Use in children and adolescents
The use of this medicine is not recommended in children under 16 years old.
Method of administration:
This medicine is taken orally.
The tablet can be divided into equal doses. The Naprosyn 500 mg tablets are scored, the transverse score on one of the faces of the tablet allows the tablet to be divided into two halves for those cases where it is necessary to administer doses of 250 mg or 750 mg.
Swallow the tablets with a sufficient amount of liquid, a glass of water or other liquid, preferably during or after meals.
Always take the smallest effective dose
If you take more Naprosyn than you should
If you have taken more Naprosyn than you should, consult your doctor or pharmacist immediately.
Symptoms of overdose are characterized by drowsiness, stomach burning, indigestion, nausea, vomiting, and in some cases, convulsions.
In case of accidental or intentional overdose, gastric lavage should be performed and symptomatic treatment should be initiated. The rapid administration of 50-100 grams of activated charcoal in the form of an aqueous suspension reduces the absorption of the medicine.
In case of overdose or accidental ingestion, consult the Toxicology Information Service, Telephone (91) 562.04.20.
If you forget to take Naprosyn
Do not take a double dose to make up for forgotten doses, take the dose at the moment you remember and continue with the next dose.
Like all medicines, this medicine can cause adverse effects, although not all people suffer from them.
The adverse effects that may occur during treatment with this medicine, and which have been observed with a very rare frequency (in less than 1 in 10,000 patients), are:
Gastrointestinal disorders:the most frequent adverse effects observed with Naprosyn are of a gastrointestinal nature (affecting the stomach and intestine)
Inflammation, bleeding (in some cases fatal, especially in the elderly), peptic ulcers, perforation, and obstruction of the upper or lower part of the gastrointestinal tract (digestive system) may occur. Cases of esophagitis (inflammation of the esophagus), gastritis (inflammation of the stomach mucosa), pancreatitis (inflammation of the pancreas), stomatitis (inflammation of the oral mucosa), and worsening of ulcerative colitis and Crohn's disease have been observed. Additionally, cases of stomach acidity, dyspepsia (digestive disorders), abdominal discomfort, nausea, vomiting, diarrhea, constipation, flatulence (gas), hematemesis (vomiting blood), and melena (black-colored stools) have been reported.
Blood and lymphatic system disorders:agranulocytosis (increase/decrease in certain white blood cells), aplastic and hemolytic anemia (reduction in the number of red blood cells, white blood cells, and platelets in the blood), eosinophilia (increase in certain white blood cells in the blood), leucopenia (decrease in the number of leukocytes in the blood), thrombocytopenia (decrease in the number of platelets), lymph node enlargement, and affectation of other body organs (drug reaction with eosinophilia and systemic symptoms, also known as DRESS). See also section 2.
Immune system disorders:anaphylactoid reactions (acute allergic reaction), angioedema (inflammation of the skin, mucosa, and viscera), elevated body temperature.
Metabolic and nutritional disorders:hypercalcemia (increased calcium concentration in the blood).
Psychiatric disorders:difficulty concentrating, depression, sleep disturbances.
Nervous system disorders:dizziness, somnolence, headaches, sensation of dizziness, vertigo, cognitive dysfunction, aseptic meningitis (inflammation of the meninges), convulsions, insomnia.
Eye disorders:vision disorders, corneal opacity, papillitis (inflammation of the papilla), retrobulbar optic neuritis (inflammation of the optic nerve), and papilla edema.
Ear and labyrinth disorders:hearing alterations, tinnitus (ringing in the ears), hypoacusis (decreased hearing).
Cardiac disorders:palpitations, congestive heart failure (inability of the heart to perform its pumping function), hypertension (high blood pressure). Medicines like Naprosyn may be associated with a moderate increase in the risk of suffering a heart attack ("myocardial infarction") or stroke.
Vascular disorders:vasculitis (inflammation of blood vessels), edema.
Respiratory, thoracic, and mediastinal disorders:asthma, eosinophilic pneumonitis, dyspnea (shortness of breath), pulmonary edema.
Infections and infestations:aseptic meningitis.
Hepatobiliary disorders:hepatitis (inflammation of the liver), jaundice (yellowing of the skin), and elevated liver enzyme levels. Medicines like Naprosyn may be associated with rare cases of liver damage.
Skin and subcutaneous tissue disorders:cutaneous hemorrhage, pruritus, capillary hemorrhage, generalized cutaneous eruptions, sweating, alopecia, skin desquamation, lichen planus (skin disease with small, flat nodules), vesicular reaction, skin redness, systemic lupus erythematosus (autoimmune disease with characteristic skin signs, eruption, and skin redness), severe bullous reactions such as Stevens-Johnson syndrome (cutaneous eruption with a map-like appearance) and toxic epidermal necrolysis, allergy, photosensitivity reactions including rare cases where the skin takes on a appearance of porphyria cutanea tarda, pseudoporphyria (defect of liver enzymes), or epidermolysis bullosa. If cutaneous fragility, blister formation, or other symptoms indicative of pseudoporphyria occur, treatment should be discontinued and the patient monitored.
Musculoskeletal and connective tissue disorders:muscle pain, muscular asthenia.
Renal and urinary disorders:blood in the urine, interstitial nephritis (renal inflammation with yellow-brown discoloration), nephrotic syndrome, kidney disease, renal failure, renal papillary necrosis (death of the cells that form the renal papillae due to metabolic alteration).
Reproductive system and breast disorders:infertility.
General disorders and administration site conditions:general malaise, pyrexia (chills and fever), thirst, sore throat, a characteristic cutaneous allergic reaction known as fixed drug eruption, which usually reappears in the same location upon re-exposure to the medicine and may appear as red, round, or oval patches and skin swelling, hives (urticaria), and pruritus.
Investigations:abnormal values of liver function tests, elevated serum creatinine, hyperpotassemia.
Reporting of adverse reactions
If you experience any type of adverse reaction, consult your doctor or pharmacist, even if it is a possible adverse reaction that does not appear in this leaflet. You can also report them directly through the Spanish Pharmacovigilance System for Human Use Medicines: www.notificaRAM.es/. By reporting adverse reactions, you can contribute to providing more information on the safety of this medicine.
Keep this medicine out of the sight and reach of children.
Do not use Naprosyn after the expiration date stated on the packaging after CAD. The expiration date is the last day of the month indicated.
No special storage conditions are required.
Medicines should not be disposed of via wastewater or household waste. Deposit the packaging and any unused medicines in the SIGRE collection point at the pharmacy. In case of doubt, ask your pharmacist how to dispose of the packaging and any unused medicines. This will help protect the environment.
Composition of Naprosyn 500 mg tablets
Appearance of the product and package contents
They are oval-shaped tablets with a yellow color. On one side, they have the inscription NPR LE 500, while on the other side of the tablet, there is a score line that allows the tablet to be divided into two equal doses.
They are available in packages of 40 tablets.
Marketing authorization holder
Atnahs Pharma Netherlands B.V.
Copenhagen Towers
Ørestads Boulevard 108, 5.tv
DK-2300 København S
Denmark
Manufacturer
Recipharm Leganés S.L.U.
C/ Severo Ochoa, 13. Pol. Ind. Leganés
28914 Madrid
Atnahs Pharma Denmark ApS
Copenhagen Towers
Ørestads Boulevard 108, 5.tv
DK-2300 København S
Denmark
Misom Labs Ltd
Malta Life Sciences Park
LS2.01.06
Industrial Estate
San Gwann, SGN 3000
Malta
Local representative
Laboratorios Rubió, S.A.
Industria, 29 - Pol. Ind. Comte de Sert
08755 Castellbisbal (Barcelona)
Spain
Date of the last revision of this leaflet in February 2025
"Detailed and updated information on this medicine is available on the website of the Spanish Agency for Medicines and Health Products (AEMPS)http://www.aemps.gob.es/"
The average price of NAPROSYN 500 mg TABLETS in October, 2025 is around 4.34 EUR. Prices may vary depending on the region, pharmacy, and whether a prescription is required. Always check with a local pharmacy or online source for the most accurate information.