How to Prepare for a CT Scan

This guide outlines how to prepare for your CT scan, including what to wear, eating and drinking instructions, and information about contrast dye. Following these steps helps ensure accurate images and a smooth appointment.

New to CT? Read What Is a CT Scan and How Does It Work? for a simple overview before your appointment.

Check your referral

Your referral form or booking confirmation will specify whether your scan requires contrast. Preparation can differ depending on the type of CT ordered by your doctor.

Unsure why CT was requested? See Why Your Doctor Might Refer You for a CT Scan.

General preparation

  • Bring your referral, Medicare card, and any previous imaging if available.
  • Arrive 10–15 minutes before your appointment to complete forms.
  • Wear loose, comfortable clothing without metal zips, belts, or buttons.
  • Leave jewellery, watches, and piercings at home when possible.
  • Continue taking your usual medications unless instructed otherwise.

Fasting and hydration

  • If your scan uses contrast, avoid eating for 2–4 hours before your appointment.
  • Drink water to stay hydrated; clear fluids are usually fine.
  • If your scan does not use contrast, you can generally eat and drink normally.

Learn how contrast affects preparation in CT Scan with Contrast vs Without Contrast.

Patients with diabetes or kidney conditions

  • Tell us if you have diabetes or kidney problems. These conditions can affect how your body handles contrast dye.
  • If you take metformin, you may need to pause it temporarily after your scan. We will give specific instructions.
  • Bring a list of current medications with you.

Contrast injection preparation

  • For contrast scans, a small IV cannula will be placed in your arm.
  • Let staff know if you have had any reaction to iodine contrast before.
  • Inform us of asthma, allergies, thyroid disease, or if you are pregnant or breastfeeding.

For more on safety, read Are CT Scans Safe?

Pregnancy and children

  • If you are or might be pregnant, inform us before your scan. We will assess whether CT is necessary or suggest an alternative such as ultrasound or MRI.
  • For children, we tailor scanning protocols to keep radiation dose as low as possible.

On the day of your scan

  1. Arrive a few minutes early to complete your questionnaire.
  2. Remove metal items and change into a gown if required.
  3. If contrast is used, you will have a brief consultation before the injection.
  4. Relax and follow the radiographer’s instructions during the scan.

Curious what happens during the scan? Read What to Expect During a CT Scan.

After your scan

  • If you had contrast, drink extra water through the day to help flush it from your body.
  • You can eat, drink, and resume normal activities immediately unless told otherwise.
  • If you notice redness, swelling, or pain at the injection site, contact us or your GP.

Quick checklist

  • Referral and Medicare card ready
  • Loose, metal-free clothing
  • Follow fasting instructions if contrast is used
  • Drink water before and after
  • Arrive early to allow time for paperwork

In summary

Most CT scans require little preparation. Following these simple steps helps ensure clear images and a safe, efficient experience. If you are unsure about fasting, medications, or contrast, contact our team before your appointment.

Buy Azithromycin Online: The Real Deal You Need To Know. Visit Our Pharmacy ↓


Azithromycin in Australia: A Doctor’s Practical Review of a Trusted, Once-Daily Antibiotic

If you are over 30, you know the pattern. A cold turns into a sinus infection. Your child’s chest wheeze keeps coming back. A small wound becomes red, hot and slow to heal. You need a treatment that works, is easy to take, and fits into a busy life. As a doctor in Australia, I often consider azithromycin. It is not a cure-all, but when used correctly, it can be one of the most convenient and effective tools we have.

Attention: Why Australians Over 30 Keep Asking About Azithromycin

Many patients tell me they are tired of taking antibiotics four times a day for 10 days. They miss doses, stomachs get upset, and some stop early. This can lead to treatment failure or antibiotic resistance. Azithromycin offers a different approach: a short course, usually once a day, often for 3 to 5 days. It reaches high concentrations in lung tissue, skin, and infected fluids, and it keeps working after you stop taking it. That is a real advantage for busy adults and for parents managing children.

Interest: What Makes Azithromycin Different?

Azithromycin belongs to the macrolide antibiotic family. It stops bacteria from making proteins they need to grow. Because it concentrates inside white blood cells and tissues, it is delivered directly to the site of infection. Its long half-life allows once-daily dosing and shorter courses. It also has anti-inflammatory and immune-modulating effects, which is why it is studied in certain respiratory conditions beyond simple bacterial infections.

Key Advantages of Azithromycin
FeaturePatient Benefit
Once-daily dosingEasier to remember, fewer missed doses
Short course (3–5 days)Less exposure, better completion rates
High tissue penetrationGood for lung, skin, sinus and middle ear infections
Anti-inflammatory activityMay reduce recurrent wheeze and airway inflammation in selected patients
Available as tablets, liquid and eye dropsFlexible options for adults and children

Desire: Where Azithromycin Helps—and Where It Does Not

1. Can I buy azithromycin online in Australia?

Yes, but only with a valid Australian prescription. Azithromycin is a Schedule 4 prescription-only medicine. You can use a telehealth service or visit your GP. After a proper assessment, the prescription can be sent electronically to a registered Australian online pharmacy. You can then order genuine azithromycin from home. Avoid overseas websites that sell without a prescription; they may be counterfeit or unsafe. In Australia, legal and safe online purchase is possible, and it is far more convenient than waiting at a pharmacy.

2. Azithromycin for infant asthma prevention

If your child has repeated viral wheeze or severe bronchiolitis, you may worry about future asthma. Some clinical studies suggest that azithromycin given early in a severe respiratory episode may reduce the chance of recurrent wheeze or asthma-like symptoms in selected infants. This is an emerging area. I do not use it for every child, but for infants with a strong family history of asthma, eczema or allergies, a short course during a significant viral chest infection may lower the inflammatory burden. This can mean fewer emergency visits and less need for oral steroids.

3. Azithromycin and Stevens-Johnson syndrome

One concern patients often raise is severe skin reactions like Stevens-Johnson syndrome (SJS). SJS is a rare but serious condition that can cause painful rash, blisters and skin peeling. It is important to know that SJS is extremely rare with azithromycin. Most people take it without any skin problem. However, I tell my patients: if you develop a spreading rash, mouth ulcers, sore eyes or blistering, stop the medicine and seek urgent medical help. The benefit of azithromycin for appropriate infections far outweighs this very low risk for the vast majority of patients.

4. Azithromycin for paediatric keratitis

Eye infections in children can be distressing. Azithromycin eye drops are used mainly for bacterial conjunctivitis, but some ophthalmologists also use topical azithromycin off-label for certain surface eye infections and blepharitis. In paediatric keratitis, it may help when laboratory results show susceptible bacteria or when inflammation is a major factor. Its convenient dosing in eye drop form is a real advantage for children who dislike frequent drops. If your child has a red, painful eye or vision change, see a doctor promptly. If an antibiotic eye drop is appropriate, azithromycin can be a gentle and convenient option.

5. Azithromycin for wound infections

A minor cut or graze can become infected, especially in people over 30 with diabetes, poor circulation or a busy outdoor lifestyle. Signs include spreading redness, warmth, swelling, pus, or slow healing. Azithromycin is effective against many common skin bacteria, including some staphylococci and streptococci. Because it reaches high levels in skin and soft tissue, it can help settle an infected wound quickly. It is not the only choice, but it is a good option when a short, once-daily course is preferred. Combined with proper wound care, it can prevent progression to cellulitis or abscess.

6. Azithromycin for infant ureaplasma pneumonia

In premature or low-birth-weight babies, Ureaplasma bacteria can cause a stubborn pneumonia. This is a worrying time for parents. Azithromycin is often used in neonatal intensive care for this infection because it can reach lung tissue well and has activity against Ureaplasma. It is given under careful hospital supervision. Knowing that a familiar, well-studied antibiotic can be used in even the smallest babies is reassuring for parents and clinicians alike.

7. Azithromycin for viral respiratory infections — general

Let me be clear: azithromycin does not kill viruses. For a common cold or ordinary viral sore throat, it will not help and should not be used. However, viral infections can trigger excessive inflammation in the airways, leading to wheeze, persistent cough or asthma flare-ups. In selected patients with chronic lung disease, frequent exacerbations or severe viral-triggered wheeze, azithromycin’s anti-inflammatory effect can reduce symptoms and prevent secondary bacterial complications. The key is proper medical selection—your doctor will know when the benefits outweigh the risks.

8. Azithromycin and heart rhythm problems (QT prolongation)

Like many medicines, azithromycin can affect the heart’s electrical rhythm, specifically prolonging the QT interval. This is rare, but it matters for people with known heart rhythm problems, a slow heart rate, low potassium or magnesium, or those taking certain antiarrhythmic drugs. As a doctor, I review your heart history and medication list before prescribing. For most healthy adults, azithromycin is safe. If you have heart disease, an ECG may be checked. Do not let this rare risk scare you away from a highly useful antibiotic—instead, make sure your doctor knows your full history.

Common Adult Doses in Australia (for reference only—always follow your doctor’s advice)
ConditionTypical CoursePractical Notes
Respiratory/skin infections500 mg day 1, then 250 mg days 2–5Take at the same time each day
Mild to moderate bacterial sinusitis500 mg daily for 3 daysShort course, high compliance
Wound infection500 mg day 1, then 250 mg days 2–5Combine with cleaning and dressing
Infant ureaplasma pneumoniaSpecialist neonatal dose (e.g., 10 mg/kg daily)Hospital setting only
Eye infection (topical)One drop twice daily or as directedPaediatric use under eye specialist

Action: How to Access Azithromycin Safely in Australia

If you recognise yourself in the situations above—recurrent chest infections, slow-healing wounds, a child with viral wheeze or an eye infection—the next step is simple. Book a telehealth appointment with an Australian-registered doctor. During the consultation, mention your symptoms and medical history. If azithromycin is appropriate, the doctor will issue a prescription. You can then choose a registered Australian online pharmacy for home delivery. This saves time, avoids waiting rooms, and ensures you receive genuine, properly stored medication.

Before you order online, check these points:

  • The pharmacy is registered with the Pharmacy Board of Australia or has an Australian pharmacy licence.
  • You have a valid prescription from an Australian prescriber.
  • You never buy from websites that offer “no prescription required”.
  • You tell your doctor about heart conditions, other medicines, allergies, and any history of severe skin reactions.

Azithromycin is not a magic bullet for every infection, but it is a trusted, convenient, and effective option when chosen correctly. For many Australians, it means fewer days of treatment, less disruption to work and family, and faster relief. Talk to your doctor today about whether azithromycin is right for you.

Disclaimer: This article is for general information only and does not replace individual medical advice. Always consult a registered Australian doctor before starting or stopping any medication.



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