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Ascorbic Acid Dosage

Medically reviewed by Drugs.com. Last updated on Mar 31, 2025.

Applies to the following strengths: 500 mg; 500 mg/mL; 90 mg/mL; 60 mg; 250 mg; 100 mg; 1000 mg; 250 mg/mL; 222 mg/mL; 500 mg/5 mL; 1500 mg; with bioflavonoids 500 mg; sodium; with citrus bioflavonoids 500 mg; 120 mg; 125 mg; 500 mg/4 g; with citrus bioflavonoids 1000 mg; 1000 mg with rose hips; 250 mg/5 mL; with bioflavonoids; 25 mg; 750 mg; 333.33 mg

Usual Adult Dose for:

Usual Pediatric Dose for:

Additional dosage information:

Usual Adult Dose for Dietary Supplement

Oral, IM, IV, subcutaneously: 50 to 200 mg/day.

Usual Adult Dose for Urinary Acidification

Oral, IM, IV, subcutaneously: 4 to 12 g/day in 3 to 4 divided doses.

Usual Adult Dose for Scurvy

Oral, IM, IV, subcutaneously: 100 to 250 mg once or twice daily for a minimum of two weeks.

Usual Pediatric Dose for Dietary Supplement

Oral, IM, IV, subcutaneously: 35 to 100 mg/day.

Usual Pediatric Dose for Urinary Acidification

Oral, IM, IV, subcutaneously: 500 mg every 6 to 8 hours.

Usual Pediatric Dose for Scurvy

Oral, IM, IV, subcutaneously: 100 to 300 mg/day in divided doses for a minimum of two weeks.

Renal Dose Adjustments

Data not available

Liver Dose Adjustments

Data not available

Precautions

Some injectable products may contain sulfites which may cause allergic-type, including anaphylactic-type, reactions in some patients.

Products containing benzyl alcohol are considered contraindicated for use in infants.

Dialysis

Ascorbic acid is dialyzable and supplementation may be necessary. There are no data on the precise supplementation dose needed; however, one author recommends <= 500 mg orally daily.

Other Comments

IM is the preferred parenteral route of administration.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

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