Free Aleve Dosage Calculator

Aleve (naproxen) belongs to the nonsteroidal anti-inflammatory drug (NSAID) family and is widely used to relieve pain, reduce inflammation, and manage fever. An Aleve dosage calculator (also referred to as a naproxen dosage calculator) helps determine the appropriate starting dose, frequency, and maximum daily limit based on the specific indication—whether it is headache, back pain, menstrual cramps, arthritis, or acute gout. This tool serves as a practical Aleve dosing guide, but it is not a substitute for professional medical advice. Always consult a doctor or pharmacist before starting or adjusting any medication.

Understanding Aleve and Naproxen

Naproxen is the active ingredient in Aleve. As an NSAID, it works by inhibiting enzymes (COX-1 and COX-2) that produce prostaglandins, the chemicals responsible for pain and inflammation. Unlike acetaminophen (paracetamol), which only addresses pain, naproxen also tackles inflammation, making it particularly effective for joint and muscle conditions, dysmenorrhea, and rheumatic disorders.

Aleve is available in several strengths and formulations:

Formulation	Common Strengths (mg)
Oral suspension	25 mg/mL (125 mg/teaspoon)
Immediate-release tablets	220, 250, 275, 375, 500, 550
Delayed-release tablets	375, 500
Extended-release tablets	375, 500, 750
Effervescent tablets	375, 500
Suppository	500

The 220 mg strength is the only over‑the‑counter (OTC) version; higher strengths require a prescription.

Aleve PM combines naproxen with diphenhydramine (an antihistamine and sleep aid) and is taken before bedtime to relieve pain while promoting sleep.

Important Safety Information

Side effects common to NSAIDs include fluid retention (edema), drowsiness, dizziness, gastrointestinal bleeding (especially in older adults with prolonged use), constipation, nausea, abdominal pain, and gastric ulcers. If you experience severe stomach pain, vomiting blood, black or bloody stools, seek medical help immediately.

Alcohol and naproxen: Drinking alcohol while taking Aleve raises the risk of gastric ulcers and other GI side effects. It is best to avoid alcohol during treatment.

Aleve and Tylenol (acetaminophen): These two medications can be taken together because no interactions have been reported. However, Tylenol does not reduce inflammation, so for inflammatory conditions, naproxen is often the preferred choice. Always verify acetaminophen doses with a separate calculator or product label.

General Dosage Guidelines

The recommended dosage depends on age, weight, and the condition being treated. The following table outlines typical Aleve dosages for adults and children aged 12 years and older:

Indication	Initial Dose	Maintenance Dose	Maximum Daily Dose
General pain (headache, muscle, back)	500 mg	250 mg every 6–8 h or 500 mg every 12 h	1250 mg (first day); 1000 mg for prolonged use
Migraine (off‑label)	750 mg	May add 250–500 mg if needed	1250 mg
Acute gout	750 mg	250 mg every 8 h until flare resolves	1250 mg
Dysmenorrhea (painful periods)	500 mg	250 mg every 6–8 h as needed	1000 mg
Rheumatic disorders	–	250 mg twice daily	–
Sciatica	–	500–1000 mg per day in divided doses	1000 mg

Dosing for Children

• Aged 12 years and older: 220 mg (one Aleve tablet) every 8–12 hours. For pain or fever, follow the OTC label.
• Juvenile arthritis (children ≥ 2 years): The daily dose is $10 \text{ mg/kg}$, divided into two equal parts. For example, a 30 kg child would receive $300 \text{ mg}$ daily (150 mg twice a day).

Aleve PM Dosage

Take 220–440 mg (1 or 2 tablets) before sleep. Do not exceed 2 tablets (440 mg) in a 24‑hour period.

Important Reminders

• Always use the lowest effective dose for the shortest possible duration.
• Never exceed 1250 mg in a single day; for long‑term use, the limit is 1000 mg per day.
• The dosing intervals are typically 6–8 hours, but some conditions (e.g., gout) may require shorter intervals initially.
• This naproxen dosage calculator is intended for informational purposes. Because individual factors (kidney function, other medications, medical history) can affect safe dosing, a healthcare provider must be consulted for personalized advice.