Doses - ASCORBIC ACID, VITAMIN C

Dogs:

To decrease intestinal copper absorption: 500 - 1000 mg per day given with meals. Note: efficacy not proven. (Johnson and Sherding 1994)
Cats: For adjunctive treatment of FIP: 125 mg PO q12h (Weiss 1994)
Guinea Pigs:
For treatment of scurvy during pregnancy: 30 mg/kg either parenterally or PO (in feed or water) (Fish and Besch-Williford 1992)
For prevention of scurvy: Add 200 mg vitamin C to one liter of dechlorinated water and add to water bottle. For treatment of scurvy: 20 - 200 mg/kg IM or SubQ (Anderson 1994)

Horses:

For replacement therapy after stress (e.g. strenuous exercise): 20 grams PO daily (Ferrante and Kronfeld 1992)

Cattle:

For vitamin C-responsive dermatitis in calves: 3 grams SubQ once or twice. (Miller 1993)
Dosage Forms/Preparations/FDA Approval Status/Withholding Times - Veterinary-Approved Products:
Parenteral Injection 250 mg/ml in 100 and 250 ml vials; Generic (Rx or OTC depending on labeling)

Human-Approved Products:

As ascorbic acid or sodium ascorbate: Oral tablets 25 mg, 50 mg, 100 mg, 250 mg, 500 mg, 1000 mg; chewable tablets: 60 mg, 100 mg, 250 mg, 500 mg, ; (various); (OTC)
Oral extended release capsules and tablets 500 mg; 1000 mg, 1500 mg; (various); (OTC)
Crystals/Powder: 4 g/tsp (in 100 & 500g); 5 g/tsp (in 180 g); (OTC)
Liquid/Syrup: 35 mg/0.6ml, 100 mg/ml, (OTC)
Parenteral Injection 250 mg/ml in 2 ml ampules and 30 & 50 ml multidose vials; various & generic; (Rx)