Naproxen is classified as propionic class of NSAIDs. Naproxen is often second drug of choice of NSAIDs after Ibuprofen. Naproxen is being used since 1976. Naproxen is widely used to treat joint pain and muscle aches. Prolonged use of naproxen is avoided because of ulcer and bleeding disorder. There are several NSAIDs included under propionic acid derivatives. The five most often used propionic acid derivatives NSAIDs are Ibuprofen, Ketoprofen, Naproxen, Oxaprozin and Fenoprofen
Alternative Name of Naproxen
Naproxen is also known as Aleve, Naprosyn, Anaprox and Flanax.
How Does Naproxen Work?: Mechanism of Action
Naproxen inhibits action of cyclooxygenase enzyme. It blocks conversion of arachidonic acid to prostaglandin. There are two types of cyclooxygenase enzyme known as Cyclooxygenase 1 (COX 1) and cyclooxygenase 2 (COX 2) enzyme. The lack of prostaglandin reduces the severity of inflammation and less irritation of pain receptors that results in less pain. The lack of prostaglandin in stomach and intestine causes ulcer formation. Chronic ulcer often causes mild to severe bleeding from eroded surface of ulcer.
Uses: Naproxen is Used for Treatment of Following Symptoms-
- Acute and chronic pain caused by skin diseases and subcutaneous abscess or infection;
- Acute or chronic pain caused by joint pain diseases or injury;
- Pain and inflammation caused by fracture of bone,
- Inflammation and pain caused by infection or tear of ligaments and tendon;
- Inflammation or tear of muscles;
- Migraine headache;
- Tension headache.
Naproxen is Used to Treat Following Diseases
- Rheumatoid Arthritis;
- Ankylosing Spondylitis;
- Menstrual pain;
- Kidney stone;
- Radicular pain caused by pinch nerve;
- Diabetic pain.
Dosage of Naproxen
Naproxen is available as immediate and extended release NSAIDs. The pills are available over the counter in most of the pharmacies. The immediate release pills strength in milligram is 200 mg, 250 mg, 275 mg, 375 mg and 500 mg. The delayed release pills are sold as 700 mg and 1000 mg pills. Naproxen is also sold as oral suspension and capsule. Naproxen dosage depends on cause of inflammation of intensity of pain. The dosage is 10 to 20 mg per kg.
Duration of Action Naproxen
After oral administration, plasma levels of naproxen are detected within 30 minutes of dosing, with peak plasma levels occurring approximately 5 hours after dosing. The observed terminal elimination half-life of naproxen from both immediate release naproxen sodium and NAPRELAN Tablets is approximately 15 hours.
Side Effects Caused by Naproxen
- Abdominal pain often caused by gastric or intestinal ulcer;
- Heartburn caused by esophagitis or esophageal ulcer;
- Bleeding from stomach or intestinal ulcer;
Precaution Needed in Following Condition
- Abdominal pain;
- History of ulcer disease;
- Bleeding disorder:
- Myocardial infarction.
Naproxen Avoided In Patient Suffering With Following Disease
- Liver disease;
- Kidney failure;
- Congestive heart failure
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