For Synthroid to be effective, it should be taken at the same time every day, following these steps :. There are no restrictions on who can use Synthroid—adults, children, and the elderly can all take the drug. Children can take the medicine if the tablet is crushed and mixed with one to two teaspoons of water. Synthroid may have interactions with the following drugs:.
This is not a complete list of Synthroid interactions. Share all supplements and prescriptions you take with your doctor or pharmacist.
Additionally, some foods can interfere with the effectiveness of Synthroid. Some of these items include:. Some people may feel better within a few days of starting Synthroid, but it may take months before your hormone levels get back to normal. Typically, Synthroid will begin improving symptoms within two weeks of starting the drug. Around the six-week mark is when a healthcare provider will test TSH levels again, monitor thyroid function, and make small adjustments to your dosage to ensure that your thyroid hormone levels are correct.
The effectiveness of Synthroid may be changed based on changes in the amount of thyroid hormone your body produces, so your healthcare provider will have to adjust dosage requirements. Major life events, like pregnancy, menopause, or aging can impact your thyroid hormone levels.
Note: If you take thyroid replacement drugs, you may have to take them for life. This is because pregnancy can sometimes increase the need for thyroid hormones. Keep in mind that untreated hypothyroidism can be dangerous during pregnancy. The drug is believed pass into human breast milk. Talk with your doctor about the risks and benefits of treatments for your condition while breastfeeding. Taking the drug exactly as prescribed by your doctor should lower your risk for side effects of Synthroid.
In rare cases, Synthroid can cause serious side effects. You should talk with your doctor if you experience symptoms of:. You should also talk with your doctor if you become pregnant while taking Synthroid. If you become pregnant, your doctor may need to increase your dose of the drug. They can help answer any questions you have about side effects of taking the drug.
Besides talking with your doctor, you can do some research on your own. These articles might help:. Disclaimer: Medical News Today has made every effort to make certain that all information is factually correct, comprehensive, and up to date.
However, this article should not be used as a substitute for the knowledge and expertise of a licensed healthcare professional. You should always consult your doctor or other healthcare professional before taking any medication. The drug information contained herein is subject to change and is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects.
The absence of warnings or other information for a given drug does not indicate that the drug or drug combination is safe, effective, or appropriate for all patients or all specific uses. Certain foods and supplements may improve or worsen symptoms of hypothyroidism, or an underactive thyroid. Here, we describe changes to the diet that…. Can yoga be beneficial for people with hypothyroidism and hyperthyroidism?
We look at the evidence and list the best yoga poses for thyroid health. Hypothyroidism and depression can produce similar symptoms. For example, both can cause changes in mood. Learn about the links between them here. Hair loss sometimes occurs if the thyroid gland is not working correctly. An overactive thyroid or an underactive thyroid can both cause hair loss…. Cannabidiol CBD is a compound in the cannabis plant that may help ease cancer symptoms and side effects of treatment. Learn more here.
Synthroid side effects: What you should know. Mild side effects of Synthroid. Serious side effects of Synthroid. FAQs about the side effects of Synthroid. Side effect specifics. Precautions for Synthroid. When to talk with your doctor. Latest news Scientists identify new cause of vascular injury in type 2 diabetes. Adolescent depression: Could school screening help? Save on Synthroid. Individual insurance plans will vary. It is meant to replace a hormone that is usually made by your thyroid gland.
Generally, thyroid replacement treatment is to be taken for life. SYNTHROID should not be used to treat noncancerous growths or enlargement of the thyroid in patients with normal iodine levels, or in cases of temporary hypothyroidism caused by inflammation of the thyroid gland thyroiditis. Healthcare Professionals.
Because the natural hair growth cycle takes several months, hair loss related to thyroid disease might only be seen months after the illness has begun. If treatment with levothyroxine has already started, it may seem like the medicine — rather than the underlying illness — is causing the hair loss.
Page last reviewed: 23 October Next review due: 23 October Levothyroxine - Brand name: Eltroxin On this page About levothyroxine Key facts Who can and cannot take levothyroxine How and when to take levothyroxine Side effects Pregnancy and breastfeeding Cautions with other medicines Common questions about levothyroxine.
About levothyroxine Levothyroxine is a medicine used to treat an underactive thyroid gland hypothyroidism. Levothyroxine starts working straight away, but it may be several weeks before your symptoms start to improve. The most common side effects of levothyroxine are caused by taking a bigger dose than you need. Your doctor can lower your dose to help reduce any side effects. Before you start taking levothyroxine, your doctor will do a blood test to see what dose you need.
Once you start taking the medicine you'll have regular blood tests to see how well it's working. Levothyroxine doses need to be carefully monitored during pregnancy. If you're planning to become pregnant or think you may be pregnant while taking levothyroxine, it's important to visit your doctor to make sure you get the correct care for you and your baby. Do not take levothyroxine and go back to your doctor to discuss your treatment if you have : had an allergic reaction to levothyroxine or any other medicines in the past an overactive thyroid hyperthyroidism a health problem that affects your adrenal glands your doctor will be able to tell you if you're not sure Check with your doctor before taking levothyroxine if you have : a heart problem including angina , heart disease or heart failure high blood pressure had a heart attack diabetes — the dose of your diabetes medicine may need to change because levothyroxine can raise blood sugar levels.
Dosage You may need to take several different tablets to make up your dose. Your doctor will tell you how many tablets to take each day.
The dose of levothyroxine varies from person to person. How to take it Swallow the tablets whole with a drink of water. What if I forget to take it? What if I take too much? Taking an extra dose of levothyroxine by accident is unlikely to harm you.
Speak to your doctor if: you accidentally take more than 1 extra dose you get side effects such as a racing heart beat or chest pain — these may not happen straight away, it can be several days before they come on Blood tests Your doctor will do regular blood tests to check the levels of thyroid hormones in your body before and after starting levothyroxine.
These will allow your doctor to adjust the dose to suit you. You may need blood tests more often if you: are pregnant start or stop a medicine that can interfere with levothyroxine have any symptoms that could mean your dose is not quite right.
Common side effects and self-help advice The common side effects of levothyroxine usually happen because the dose you're taking is more than you need. Feeling sick Stick to simple meals and do not eat rich or spicy food. Being sick vomiting or diarrhoea Drink plenty of water to prevent dehydration. Headaches Make sure you rest and drink plenty of fluids.
Feeling restless or excitable, or problems sleeping These symptoms should improve as your body gets used to levothyroxine.
Flushing or sweating Try cutting down on coffee, tea and alcohol. Muscle cramps If you get unusual muscle ache, which is not from exercise or hard work, talk to your doctor. Shaking, usually of the hands Talk to your doctor as you may need to have your dose reduced. Serious side effects It happens rarely, but some people may have serious side effects when taking levothyroxine.
Call a doctor straight away if you get: chest pain fast or irregular heartbeats, or palpitations Serious allergic reaction In rare cases, it's possible to have a serious allergic reaction anaphylaxis to levothyroxine. Information: You can report any suspected side effect using the Yellow Card safety scheme.
Visit Yellow Card for further information. Levothyroxine and pregnancy Levothyroxine is usually safe to take in pregnancy. Levothyroxine and breastfeeding It's usually safe to breastfeed while you're on levothyroxine. Non-urgent advice: Tell your doctor if you're:.
They include: medicines for fits or seizures — such as carbamazepine and phenytoin rifampicin amiodarone oestrogens — such as in combined contraceptive pills or hormone replacement therapy HRT Levothyroxine can change how other medicines work, so their doses may need to be altered.
These medicines include: medicines for diabetes — either insulin or tablets the blood thinning medicine, warfarin Some medicines should not be taken at the same time of day as levothyroxine as they can reduce the amount of levothyroxine your body takes in, including: antacids calcium salts iron salts orlistat, a medicine used for weight loss sucralfate, a medicine used to treat stomach ulcers some cholesterol-lowering medicines such as colestyramine, colestipol or colesevelem Read the information leaflet supplied with these medicines or speak to your pharmacist for advice on how much time to leave between taking these medicines and taking levothyroxine.
Mixing levothyroxine with herbal remedies and supplements There's very little information about taking herbal remedies and supplements with levothyroxine.
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