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General Description
Levothyroxine (Synthroid is the most popular brand name) is a synthetical thyroid hormone which is released in pills for oral administration and used to treat thyroid deficiency.
How Levothyroxine Works
Thyroid hormone produced by thyroid gland is essential in basal metabolism and proper growth of all tissues in human body because it contains iodine the lack of which can cause serious health problems. Thyroid hormones control assimilation of fat, vitamins, protein and other nutritional components by all body cells, by soft and hard tissues. They regulate releases of warmth by human body as well. That's why both redundancy and deficiency of thyroid hormone can lead to a whole range of diseases. Health problems caused by lack of thyroid hormone include underdevelopment, obesity, speech problems, psychrophobia, etc. Introduction of levothyroxine reduces thyroid deficiency and normalizes metabolic function.
Prescription
Levothyroxine is used to treat hypothyroidism and euthyroid goiter. The effectiveness of the drug can become apparent in a couple of days or only in several weeks. However one should not stop taking the drug abruptly even if one feels better or on the contrary - doesn't see any progress at all.
Patients with thyroid deficiency usually have to continue taking small dosages of levothyroxine during all their life to maintain constant balance of thyroid hormone in their body. However you shouldn't take any additional amount of this drug unless it was prescribed by your doctor.
Levothyroxine Dosage
Your regular dosage depends on your age, body weight and level of health. A common dosage of levothyroxine is 1-1.7 mcg per 1 kg a day. That means if you weigh 60 kg, you might be prescribed 60-100 mcg a day depending on your age and health condition. In rare cases the highest daily dosage can be 350-400 mcg. Take levothyroxine 0.5-1 hour before your meal with a full glass of water to help your organism imbibe the medicine.
Missed Dose
If you forget to take the medicine in time, you can take levothyroxine when you recall it. If it's time to take your next dose, miss the pill you forgot and take it when the next due time comes. Don't take additional dose for the pill that you forgot to take.
Overdose
Large overdosage might be hazard to life and might require administration of drugs that decrease the contraction and speed of the heart. If you think you've overdosed call for urgent medical assistance immediately.
Levothyroxine(Synthroid) Side Effects
Most common side-effects caused by levothyroxine are: frequent and irregular pulse, irritability, sleeplessness, sleep disorders, stomach upsets, body weight loss, limosis, hyperhidrosis.
One should try to get medical assistance without delay if one experiences breathlessness or swelling of the face since this might be a sign of an allergic response to levothyroxine.
Women can use this drug during pregnancy and breast-feeding safely since levothyroxine cannot get into their milk and will not harm their baby. Some women with thyroid deficiency might even need to take a bigger dose of levothyroxine during pregnancy. You should discuss it with your doctor.
Don't give your levothyroxine medicine to children or other people in your household. Levothyroxine should be prescribed to every person individually on a case-by-case basis.
Before using levothyroxine, you should provide your physician with detailed information about any heart, thyroid gland or adrenal gland problems you had in the past. One should also undergo several medical tests to make sure the medicine works for them.
Interaction with Other Substances
You should give your doctor a full enumeration of all the drugs or vitamins you are planning to take with levothyroxine since they might suppress levothyroxine's effectiveness or influence on your treatment process in some other ways.
If you take any vitamins or food supplements containing calcium, magnesium, aluminum, zinc or iron during your levothyroxine treatment period, try to take them 4 hours before or after you take levothyroxine.
For Your Information
Lack of thyroid hormone leads to iodine deficiency and may result in a developmental delay or other concomitant diseases. Levothyroxine is one of the most widely-spread effective drugs that helps patients get rid of constant tiredness and weakness, get better tolerance to cold and lose their weight.
What is the shelf life of the pills?
- The expiry date is mentioned on each blister. It is different for different batches. The shelf life is 2 years from the date of manufacture and would differ from batch to batch depending on when they were manufactured.
