About ferrous sulphate
Oral iron replacement
Used for
- Treats iron-deficiency anaemia
- Prevents iron deficiency in people at increased risk
Usual adult dose
Usually 100–200 mg elemental iron daily, divided into doses; dose depends on severity and local guidance.
Usual dose in children
Usually 3–6 mg/kg elemental iron daily in one or divided doses; prescribed dose depends on age and condition.
Common side effects
- Nausea, stomach discomfort, or constipation
- Diarrhoea
- Dark stools
- Tooth staining from liquid drops
Important warnings
- Keep out of children’s reach; overdose can be fatal.
- Iron can worsen iron overload disorders and some non-iron anaemias.
- Liquid iron may stain teeth; dilute or rinse after use.
- Dark stools are common; seek assessment for tarry stools or bleeding.
Pregnancy
Generally used when needed to treat or prevent iron deficiency; dosing should be guided by a clinician.
Breastfeeding
Generally compatible with breastfeeding at usual doses.
Interactions
- Reduces absorption of levothyroxine, tetracycline and quinolone antibiotics; separate doses.
- Antacids, calcium, tea, coffee, and dairy can reduce iron absorption.
- Iron may interact with levodopa and bisphosphonates; separate dosing as directed.
- Vitamin C can increase iron absorption.
AI-generated from general medical knowledge, not from this product's official leaflet. It may be incomplete or out of date. Not medical advice — ask a pharmacist or doctor before making any decision.