Levothyroxine

What is Levothyroxine?

  • Levothyroxine is a medication given to help with an underactive thyroid, providing the body with the thyroid hormone it needs to function properly.

How Does it Work and Why is it Important to Take?

  • Levothyroxine works by giving your body a synthetic form of thyroid hormone, crucial for regulating metabolism and maintaining overall well-being and energy levels.

  • It's vital to take Levothyroxine as prescribed to keep your thyroid function in check, addressing symptoms like fatigue, weight gain, and sensitivity to cold.

The Dose of The Medication

  • Your dose will be tailored to your needs by your clinician.

  • Typically, you might start with 50 to 100 micrograms once a day, with adjustments made gradually over time as needed.

How and When to Take It

  • Take Levothyroxine on an empty stomach, at least 30 minutes before breakfast, other medications, or caffeinated drinks.

What to Expect

  • While Levothyroxine can start working right away, it may take some time, potentially months, to feel the full effects.

What to Do if You Miss a Dose

  • If you miss a dose, take it as soon as you remember.

  • However, if it's almost time for your next dose, skip the missed one—never double up.

Possible Side Effects

  • Headaches

  • Diarrhoea

  • Anxiety

  • Nausea and vomiting

  • Flushing

  • Muscle cramps

  • Feeling restless and excitable

  • Sleeping problems

  • Muscle cramps

  • Shaking, usually the hands

Management of Side Effects

  • Click here for common side effects and how to manage them.

  • Contact your GP clinician if you experience sleeplessness, diarrhoea, anxiety, muscle cramps, or shaking, as this could indicate an issue with your dosage.

  • Some side effects may improve as your body adjusts to the medication.

  • For severe, persistent, or bothersome side effects, consult your GP clinician or local pharmacy.

Common Interactions

  • Inform your clinician about all medications you're taking, including over-the-counter and herbal supplements.

  • Avoid taking antacids, calcium, or iron supplements at the same time. Discuss with your GP clinician or local pharmacy if needed.

Special Warnings

  • Levothyroxine treatment is typically lifelong and should not be stopped suddenly.

  • Watch for signs of over-treatment, as described under side effect management.

Monitoring Your Progress

  • Regular check-ups with your GP clinician are necessary to monitor your thyroid function and adjust your medication if needed.

Where to Find More Information and Who to Contact

  • Refer to the patient information leaflet and the NHS website for more details.

  • If you have questions or experience unusual symptoms, contact your GP clinician, local pharmacy, or NHS 111.