Blood tests are one of the most common reasons patients visit their GP in Dublin. Whether your doctor has recommended routine bloods as part of a health check, you are managing a long-term condition, or you need specific tests before a referral, understanding what to expect can help you feel more at ease. This guide explains how blood tests work at your GP practice, what the most common tests are, and how to prepare for your appointment.
Why Might Your GP Request Blood Tests?
Your GP may request blood tests for a wide range of reasons. Routine screening bloods are often part of an annual health review, particularly for patients over forty or those enrolled in Chronic Disease Management (CDM). If you have a condition such as diabetes, high cholesterol, thyroid disease, or high blood pressure, regular blood tests help your doctor monitor how well your treatment is working and whether any adjustments are needed.
Blood tests are also used to investigate new symptoms. If you are feeling unusually tired, losing weight without trying, experiencing frequent infections, or noticing changes in your mood or energy levels, your GP may order bloods to check for underlying causes. Common investigations include a full blood count, kidney and liver function, thyroid function, blood sugar levels, and cholesterol. In some cases, your GP will also check vitamin D, B12, and iron levels, particularly if fatigue is a concern.
What Happens During a Blood Test at Your GP?
At most GP practices, blood tests are carried out by the practice nurse. The process is straightforward and typically takes only a few minutes. The nurse will ask you to roll up your sleeve and will apply a tourniquet to your upper arm to make the vein more visible. A small needle is used to draw the blood into one or more sample tubes, depending on the tests your doctor has ordered. You may feel a brief pinch, but the procedure is generally well tolerated.
Once the samples are collected, they are sent to a laboratory for analysis. Results usually come back within three to five working days, though some specialised tests may take longer. Your GP practice will contact you with the results, or you may be asked to book a follow-up appointment to discuss them. If anything requires urgent attention, the practice will reach out to you directly.
How to Prepare for Your Blood Test
For most blood tests, no special preparation is needed. However, certain tests do require fasting beforehand. A fasting blood test means you should not eat or drink anything other than water for eight to twelve hours before your appointment. Fasting is most commonly required for glucose tests, cholesterol panels, and lipid profiles. When your GP or nurse books your blood test, they will let you know whether fasting is necessary. Morning appointments are usually recommended for fasting bloods so you can eat as normal afterwards.
It is a good idea to stay well hydrated by drinking water before your appointment, as this makes it easier for the nurse to find a vein. Wear clothing with sleeves that can be rolled up comfortably. If you have a history of feeling faint during blood draws, mention this to the nurse beforehand so they can take extra care.
Common Blood Tests Explained
A full blood count (FBC) measures the levels of red blood cells, white blood cells, and platelets in your blood. It is one of the most frequently requested tests and can help detect infections, anaemia, and other conditions. Liver function tests (LFTs) assess how well your liver is working and are particularly important for patients taking certain medications. Kidney function tests, including urea and creatinine levels, are essential for patients with high blood pressure or diabetes.
Thyroid function tests check whether your thyroid gland is producing the right amount of hormones. An underactive or overactive thyroid can cause a wide range of symptoms, from fatigue and weight gain to anxiety and heart palpitations. HbA1c is a blood test used to monitor blood sugar control over the previous two to three months, and it plays a central role in diabetes management. Your GP will explain which tests are relevant to your situation and what the results mean for your health.
Are Blood Tests Covered by Medical Card or DVC?
If you hold a medical card (GMS), blood tests requested by your GP are covered at no additional cost to you. This includes routine monitoring bloods and any tests needed as part of your ongoing care. Patients with a Doctor Visit Card (DVC) are also covered for GP-requested blood tests. Private patients may be charged a fee for phlebotomy, which varies between practices. If you are unsure about costs, contact your GP practice in advance to confirm.
Blood tests are available at all three of our clinics, including our GP Dublin 2 clinic on Camden Street, where you can book a same-day appointment.
Book an Appointment at Clarius Health
If you need blood tests or would like to discuss routine health screening with a GP, Clarius Health offers convenient appointments across three Dublin locations. Our experienced practice nurses carry out blood tests on-site, and results are reviewed promptly by your doctor.
Visit us at Clarius Health Camden, 35 Camden Street Upper, Dublin 2; Clarius Health Crumlin, Kildare Road, Dublin 12; or Clarius Health — Cabra Medical Centre, 109 Cabra Road, Dublin 7.
To book an appointment or to register as a new patient, contact us at info@clarius.ie or call 01 568 8380.
