Day of iron infusion

Overview

An iron infusion is a procedure where iron is given directly into your bloodstream through a vein. It is often used to treat low iron levels (iron deficiency anaemia) before surgery to help your blood carry more oxygen and reduce the need for blood transfusions.

Yes, iron infusions are a common treatment for iron deficiency anaemia, especially when oral iron tablets have not worked or cannot be tolerated. Many people have them before major surgery.

It affects anyone with iron deficiency anaemia, including people scheduled for surgery, those with heavy bleeding, or those with conditions that prevent iron absorption.

Symptoms

Common symptoms

• Mild headache or dizziness
• Metallic taste in the mouth
• Nausea or stomach discomfort
• Warmth or flushing at the IV site

Symptoms in children

• Anxiety or restlessness
• Crying or irritability
• Mild tummy ache
• Tiredness after the infusion

Symptoms in older adults

• Feeling faint or lightheaded
• Muscle cramps
• Headache
• Temporary increase in blood pressure

Causes

Main causes

• Iron deficiency anaemia caused by blood loss (such as heavy periods or surgery)
• Poor absorption of iron from food or tablets (for example, after stomach surgery or with celiac disease)
• Increased need for iron during pregnancy or rapid growth

Risk factors

• Having heavy menstrual periods
• Having a condition that affects the gut, like Crohn's disease or ulcerative colitis
• Taking medications that reduce stomach acid
• Undergoing surgery that may cause significant blood loss

When to see a doctor

See a doctor urgently if:

• If you experience any signs of an allergic reaction during or after the infusion (see emergency symptoms)
• If you develop chest pain, severe headache, or difficulty breathing

Book a routine appointment if:

• If you feel very tired or have symptoms of anaemia (pale skin, weakness, shortness of breath) – discuss with your GP
• Before surgery, to check if you need an iron infusion

Diagnosis

Your doctor will arrange a blood test to check your haemoglobin (the part of red blood cells that carries oxygen) and ferritin (a measure of iron stores). If levels are low, an iron infusion may be recommended.

Tests that may be done

• Full blood count (FBC) to measure haemoglobin
• Ferritin level to check iron stores
• Iron studies (serum iron, transferrin saturation) to confirm deficiency

What to expect at your appointment

On the day of your iron infusion, a nurse will place a small IV line in your arm. The infusion is given slowly – you can watch TV, read, or relax. Staff will check your blood pressure and pulse regularly. After the infusion, the IV is removed, and you can go home.

Treatment

The main treatment for iron deficiency before surgery is replacing iron quickly. An iron infusion delivers iron directly into the bloodstream, which works faster than oral tablets. It helps build up your iron stores before an operation, lowering the risk of needing a blood transfusion.

Self-care at home

• Drink plenty of water before and after the infusion
• Eat a light meal beforehand – a full stomach may make nausea worse
• Wear comfortable, loose clothing so the nurse can easily access your arm
• Plan to rest for the rest of the day – you may feel a bit tired

Medical treatments

Iron is given as a liquid through a drip. The type and dose of iron are chosen by your healthcare team based on your weight and how low your iron levels are. You will be monitored during the infusion for any reactions. Most people need only one or two infusions before surgery.

When is surgery considered?

Iron infusions are often given 2 to 4 weeks before planned surgery to give your body time to make new red blood cells. Your surgeon or anaesthetist will decide the best timing for you.

Living with this condition

After an iron infusion, most people feel well enough to return to normal activities the next day. Some may feel tired for a day or two as their body adjusts. Your energy levels will gradually improve over the following weeks.

Lifestyle tips

• Avoid heavy exercise or heavy lifting for 24 hours after the infusion
• Keep the IV site clean and dry – a small bruise is common and harmless
• If you feel dizzy, sit or lie down until it passes

Diet and exercise

You can eat normally after an iron infusion. While the infusion itself boosts iron levels, eating iron-rich foods (like lean meat, beans, and leafy greens) can help maintain healthy levels. Gentle walking is fine, but listen to your body and rest if needed.

Mental health and emotional wellbeing

Low iron can make you feel tired, irritable, or low in mood. The infusion often helps these feelings improve. If you feel anxious about the procedure, talk to your nurse – they can explain what will happen and help you feel calm. If you are struggling with mood or anxiety, please reach out to your GP or a mental health support service for advice.

Prevention

In many cases, iron deficiency can be prevented or caught early with regular health checks, especially if you have risk factors like heavy periods or gut conditions. Eating a balanced diet with enough iron may help, but some people need extra iron from supplements or infusions.

Vaccines

There is no vaccine for iron deficiency.

Screening programmes

Blood tests can screen for low iron. If you are planning surgery, your doctor will often check your iron levels as part of the pre-operative assessment.

Complications

If left untreated

• Persistent tiredness and weakness that can affect daily life
• Increased risk of needing a blood transfusion during surgery
• Heart problems, such as an irregular heartbeat or heart failure, if anaemia is severe

Long-term outlook

The outlook is very good. An iron infusion is a safe and effective way to correct low iron levels quickly. Most people feel more energetic within a few weeks. For those having surgery, it reduces the chance of complications and helps recovery. Your healthcare team will check your iron levels again after the infusion to make sure they are back to normal.

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