Levo-thyroxine (synthetic)
Uses of Levo-thyroxine (synthetic)
The primary use of Levo-Thyroxine (Synthetic) is to treat hypothyroidism (primary, secondary and tertiary hypothyroidism). It belongs to the class of synthetic thyroid hormones.
This medicine is also used to help manage thyroid cancer and to treat severe hypothyroidism in emergencies. Additionally, it may be used off-label for certain conditions like organ recovery and mild hypothyroidism when symptoms are present and TSH levels are high.
Side effects of Levo-thyroxine (synthetic)
Nausea
Vomiting
Diarrhoea
Headache
Shaking usually in hands
Muscle cramps
How Levo-thyroxine (synthetic) works
Levo-Thyroxine (Synthetic) is a synthetic thyroid hormone. It works by replacing or providing more thyroid hormone, which is normally produced by the thyroid gland. The thyroid hormone regulates energy and metabolism within the body, affecting nearly every organ system.
Certified content
Written By
Doctor of Medicine
Reviewed By
BMS, FMC, MD Resident
Expert Advice
Dosage Forms Available
This medicine is available in the form of tablets and soft gel capsules for oral administration.
Age and Dose Restrictions
This medicine is meant for use in both adults and children, including newborns. The dose varies depending on age, weight, and the condition being managed.
Contraindications
Levo-Thyroxine (Synthetic) is contraindicated in patients with untreated adrenal insufficiency.
Additionally, it is not recommended for use in patients who have recently suffered an acute myocardial infarction.
Other Medications to Avoid
This medicine may interact with calcium carbonate, iron supplements (eg., ferrous fumarate and ferrous sulfate), antacids (eg., aluminium hydroxide), sucralfate, cholesterol-lowering agents (eg., colestipol, cholestyramine), and blood thinners (eg., warfarin, heparin).
Overdose and Missed Dose
Overdose of Levo-Thyroxine (Synthetic) can lead to symptoms like rapid or irregular heartbeat, tremors, nervousness, or insomnia.If you observe these symptoms, consult your doctor and follow their advice.
If you forget to take a dose, take it as soon as you remember. But, if it is time for your next dose skip the missed dose and resume your regular dosing regime. Avoid repeating the dose.
Management of Side Effects
Most side effects are temporary and generally harmless and resolve after discontinuing this medicine. However, if you experience any severe side effects or worsening of any of the symptoms, please consult your doctor.
Taking the medication at the same time each day can help manage some side effects.
Paying attention to any changes in your body's reactions can also be helpful.
Use in Driving and Operating Machinery
Levo-Thyroxine (Synthetic) does not typically affect the ability to drive or operate machinery. However, if side effects like dizziness or nervousness occur, it is best to avoid such activities.
Use in Pregnancy and Lactation
You should consult your doctor before taking this medicine during pregnancy and breastfeeding.
Caution in Other Conditions
Elderly patients and patients with cardiovascular disorders or long-standing hypothyroidism should exercise caution while taking this medicine.
Special Dietary and Lifestyle Recommendations
Involve in regular physical activities and meditations to reduce stress.
Regular medical check-ups and blood tests are crucial in monitoring the condition and the effectiveness of the medication.
Frequently asked questions
Can Levo-Thyroxine (Synthetic) cause weight loss?
Yes, excessive doses of Levo-Thyroxine (Synthetic) can cause weight loss. However, this is not a desirable or healthy way to lose weight because it can lead to other health problems.
Does Levo-Thyroxine (Synthetic) affect menstrual cycle?
Yes, an overdose of Levo-Thyroxine (Synthetic) can cause menstrual irregularities. If you experience changes in your menstrual cycle while taking this medicine, please consult your doctor.
How long do I need to wait after eating before taking Levo-Thyroxine (Synthetic)?
Levo-Thyroxine (Synthetic) should be taken on an empty stomach, at least 30 minutes to 1 hour before breakfast, for optimal absorption.
Can Levo-Thyroxine (Synthetic) cause mood swings?
Yes, levo-thyroxine can cause mood swings in some individuals, often due to changes in thyroid hormone levels or dosage adjustments. If you experience significant mood changes, consult your healthcare provider.
Is there a risk of addiction with Levo-Thyroxine (Synthetic)?
No, there is no risk of addiction with levothyroxine. It’s a thyroid hormone replacement medication used to treat hypothyroidism and is not addictive.
Can I suddenly stop taking Levo-Thyroxine (Synthetic) if I feel better?
It is not recommended to stop taking Levo-Thyroxine (Synthetic) without consulting your doctor, even if you feel better. Stopping suddenly may cause your symptoms to return or worsen.
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