After an iron infusion, mild effects such as headache, fatigue or a metallic taste may occur but usually settle within one to two days. Most people notice improved energy within one to three weeks as iron stores rebuild. Brisbane City Doctors monitors recovery, arranges follow-up blood tests and advises when to seek medical review.
If you’ve recently had an iron infusion or are preparing for one, you might be wondering what happens next. Many patients feel anxious about how they’ll feel afterwards, how soon they’ll notice an improvement, and what side effects they might experience.
At Brisbane City Doctors, we provide safe, GP-supervised iron infusions and guide you through every step of your recovery. Here’s what you can expect in the days and weeks following your treatment.
A Quick Recap of the Iron Infusion Process
An iron infusion is a simple procedure where iron is delivered directly into your bloodstream through a vein in your arm. The treatment usually takes 45 to 60 minutes, followed by a short observation period to ensure you feel well before you leave.
Infusions are commonly recommended for people who:
- Have iron deficiency or anaemia that hasn’t improved with tablets
- Cannot tolerate oral iron due to stomach upset
- Need to boost iron quickly before surgery or during pregnancy
If you haven’t yet received treatment and would like to learn more about the process, see our dedicated Iron Infusions page for detailed information.
Common Short-Term Side Effects
Most people tolerate iron infusions very well, but it’s common to have mild side effects during or shortly after the procedure. These can include:
- A metallic taste in your mouth
- Flu-like symptoms such as tiredness, muscle aches or mild fever
- Headache or dizziness for a few hours
- Tenderness or bruising where the cannula was inserted
These effects are temporary and usually improve within a day or two. Rest, hydration and gentle movement can help your body recover more comfortably.
Rare Side Effects
Serious side effects are uncommon but can occur. These may include an allergic reaction, skin staining at the injection site or, very rarely, a condition called hypophosphataemia (low phosphate levels).
Your GP and nurse will monitor you closely during and after your infusion, and you’ll be advised to contact the clinic if you experience anything that feels unusual once you’re home.
How Soon Will You Feel Better?
Improvement after an iron infusion is not always immediate. While some people notice a boost in energy within a few days, most begin to feel better within one to three weeks.
This gradual improvement happens as your body uses the iron to rebuild red blood cells and restore oxygen delivery. How quickly you recover depends on factors such as:
- How low your iron was before treatment
- Whether you have ongoing blood loss
- Your diet, sleep and overall health
Your GP will usually arrange a follow-up blood test about four to six weeks after your infusion to check that your iron stores have returned to a healthy range.
Tips to Maximise Your Recovery
Supporting your iron levels after the infusion helps maintain the benefits and reduces the likelihood of deficiency returning.
Here are some practical steps to take:
- Eat iron-rich foods such as lean red meat, poultry, lentils, beans and leafy greens.
- Pair iron sources with vitamin C (like oranges, strawberries or tomatoes) to boost absorption.
- Avoid drinking tea or coffee with meals, as they can reduce iron uptake.
- Stay hydrated and rest as needed in the first 24 hours after your infusion.
- Attend your follow-up appointment to confirm your iron levels and discuss ongoing care.
Your GP may also investigate any underlying cause of iron loss, such as heavy menstrual bleeding, digestive issues or dietary insufficiency, to ensure you remain well long-term.
When to Contact Your Doctor
Call your GP or the clinic immediately if you experience any of the following after your iron infusion:
- Severe rash, swelling, or difficulty breathing
- Ongoing fever or chills
- Pain or discolouration at the infusion site that worsens over time
- Persistent fatigue or new symptoms that don’t improve
It’s always better to check in with your doctor rather than worry at home. Our team at Brisbane City Doctors is available to answer your questions and ensure you recover safely.
Continuing Care with Brisbane City Doctors
Iron deficiency can return if the underlying cause isn’t addressed, so regular monitoring and follow-up are essential. At Brisbane City Doctors, we provide ongoing care to identify potential causes, review your results and support your overall wellbeing.
If you’re feeling persistently tired or think your iron might be low, book an appointment today. You can call (07) 3221 3366 or book online .
Disclaimer: The information provided in this blog is for general educational purposes only and should not be taken as medical advice. Please consult your doctor or a qualified healthcare professional for advice specific to your situation.