Ascorbic acid
Also sold as: Redoxon, Celin
No prescription neededVitamins and minerals
Comes as:TabletChewable tabletInjection
Usual adult dose
Usual adult dose as a supplement: 100 to 500 mg once a day. Do not take more than 1 g a day for long periods unless a doctor advises.
Your doctor may give you a different dose. Children's doses depend on weight.
Side effects
Common
- stomach upset
- heartburn
- diarrhoea at high doses
Serious — get help
Stop taking it and see a doctor straight away if you notice:
- kidney stone pain with long-term high doses
- severe allergic reaction
Do not take it, or take care, if
- History of kidney stones (avoid high doses)
- Iron overload or thalassaemia (avoid high doses unless a doctor advises)
- G6PD deficiency (avoid high doses)
Interactions
No important interactions are listed in our database. Still tell your doctor or pharmacist everything you take.