Nuclear Medicine Preparation Instructions

All Patients Must

  • Bring your valid health card to your appointment.
  • Arrive 20 minutes early to register.
  • Refrain from wearing scents (we are a scent-free environment).

Please follow the specific exam instructions below. These instructions are important and must be followed.

GNMI Patient Preparation

Nuclear Medicine Preparation

Hepatobiliary Scan

  • Fast for at least 4 hours (but not more than 12 hours).

Renal Scan

  • Drink 2 large glasses of water (about 500 ml / 20 oz) 30–60 minutes prior.
  • You may void before the exam.

Thyroid Uptake and Scan

  • Fast for 4 hours.
  • Discontinue thyroid hormones (Levothyroxine/Synthroid) for 4–6 weeks and PTU/Tapazole for 1 week.
  • Do not take multivitamins or iodine-rich foods (kale, kelp, seaweed).
  • Important: Check with your doctor before stopping any thyroid medications.

Nuclear Cardiology Preparation

  • No caffeine for 24 hours: no coffee, tea (including decaf/herbal/green), chocolate, cola, or caffeine-containing medications (Tylenol #1–3, Excedrin Migraine).
  • Nothing to eat or drink 4 hours prior. (If diabetic → light meal allowed.)
  • Bring a list of all prescription medications.
  • Consult your doctor about stopping certain medications before the test:
    • Beta Blockers: 48 hrs prior
    • Erectile Dysfunction Rx: 72 hrs prior
    • Calcium Channel Blockers: 24 hrs prior
    • Do Not stop medication on your own.

Stress Test Preparation

  • Wear comfortable clothing and running shoes for the exercise stress test.