Iron — Drug Interactions, Alcohol & Pregnancy Guide
Last reviewed: · Source: US FDA drug label database · 247CanITakeWith Editorial Team
- Iron is a Mineral supplement / Haematinic used for Iron deficiency anaemia.
- This page covers 1 specific drug combination with Iron.
About Iron
Iron supplements are used to treat and prevent iron-deficiency anaemia. They are commonly prescribed in pregnancy. Iron must be separated from levothyroxine, antacids, calcium and certain antibiotics (tetracyclines, fluoroquinolones) by at least 2 hours.
Also sold as: Ferrous sulphate, Ferrous fumarate, Pregaday, Spatone, Floradix
US name: Ferrous Sulfate
Iron at a glance
Iron is classed as mineral supplement / haematinic and is used for iron deficiency anaemia, prevention of anaemia in pregnancy, restless legs syndrome (off-label). It can be bought over the counter in the UK, but that does not mean it is safe with everything — check the label and ask a pharmacist if you take other medicines.
Typical adult dosing guidance: 200mg ferrous sulphate (65mg elemental iron) 1-3 times daily. Your own label or prescription always takes priority over general figures.
Interactions most often flagged
- Levothyroxine
- Doxycycline
- Antacids
- Calcium
Before you combine Iron with anything new
- Read the patient information leaflet for both products.
- Keep one up-to-date list of every medicine and supplement you take.
- Ask a pharmacist — it is free and takes a couple of minutes.
- Seek urgent medical help if you feel seriously unwell after combining medicines.
Iron — Drug Combinations
⭐ Recommended on Amazon
Weekly Pill Organiser
Keep track of multiple medications with a clear 7-day pill box — reduces missed and double doses.
View on Amazon →Medication Record Book
Log your medications, doses and times to stay safe and flag any concerns to your pharmacist.
View on Amazon →Lockable Medicine Cabinet
Store all your medications safely in one place, out of reach of children.
View on Amazon →Affiliate links below. This page contains affiliate links through Amazon and CJ Affiliate. As an Amazon Associate we earn from qualifying purchases. We may earn a commission if you buy through them, at no extra cost to you.
Frequently Asked Questions
What is Iron used for?
Iron is a Mineral supplement / Haematinic used for Iron deficiency anaemia, Prevention of anaemia in pregnancy, Restless legs syndrome (off-label).
What is the maximum adult dose of Iron?
The maximum adult dose is 200mg ferrous sulphate (65mg elemental iron) 1-3 times daily. This is general guidance — always follow the dose on your prescription or product label, and check with a pharmacist if you're unsure.
Is Iron available over the counter in the UK?
Yes, Iron is available over the counter in the UK.
What should I check before taking Iron with other medicines?
The interactions most often flagged for Iron are: levothyroxine, doxycycline, antacids, calcium. Tell your pharmacist or prescriber about everything you take, including over-the-counter products, supplements and herbal remedies, before combining it with anything new.
What are the brand names for Iron?
Iron is sold under brand names including Ferrous sulphate, Ferrous fumarate, Pregaday, Spatone, Floradix. The active ingredient is the same, so check labels carefully to avoid doubling up on it.
Do I need a prescription for Iron?
Iron does not need a prescription in the UK, but a pharmacist can still advise whether it suits you alongside your other medicines.
Not sure if Iron is safe with your other medications?
HealthLabs.com lets you check liver enzyme or kidney function levels before combining medications long-term — no GP referral needed.
Check your levels at HealthLabs →Always speak to your pharmacist or GP for personalised medical advice. Affiliate link — we may earn a commission.