Can you eat 30 minutes after taking Synthroid?

In this brief guide, we will address the issue, “can you eat 30 minutes after taking Synthroid?” In addition, we will discuss what happens if you eat 30 minutes after taking Synthroid. Finally, we will discuss if you can eat 30 minutes after taking Synthroid.

Can you eat 30 minutes after taking Synthroid?

You can eat 30 minutes after taking Synthroid. Yes, it is the minimum time indicated to consume some food. Generally speaking, 30 min to 60 min is reported, but 30 min is enough time for you to eat your meal normally.

What is Synthroid?

Synthroid® is a drug indicated for the treatment of hyperthyroidism. Hyperthyroidism is a disease where the thyroid gland loses the ability to produce sufficient amounts of the hormone.

Synthroid is just a trading name given to the substance that is a substitute for this hormone produced by the thyroid gland, it is levotiroxina.

Taking Synthroid helps the body get as close as possible to the necessary hormonal homeostasis.

The use of levoritoxin (Synthroid) is the most commonly used therapy in the treatment of hyperthyroidism. Levothyroxine is a synthetic form of the thyroid hormone T4.

According to the information in the package insert and scientific studies, Synthroid works by maintaining normal levels of this hormone not produced by the gland sufficiently.

The dosage used will depend on several factors, being, therefore, differences among the patients who use them. Factors such as age, clinical conditions, body weight, use of other medications in parallel, and cardiovascular condition.

Is it better to eat before or after taking Synthroid?

It is recommended to take Synthroid after breakfast, that is, on an empty stomach. In addition, it is recommended that it be taken with a minimum interval of 4 hours from other medications that may impair its absorption by the body.

When Synthroid is not taken in the right way, the full dose is not reached in the body, possibly not being enough to what was expected.

Synthroid is absorbed in the intestine and the concomitant intake of iron, calcium, some medications, and some foods end up reducing absorption and therefore negatively affecting the medication.

This is one of the factors that explain the importance of taking Synthroid before eating, to prevent this reduction in absorption from occurring.

The fact of taking Synthroid without having had a meal before, as well as any other medication, is not so well accepted by patients, as many people need to take other medications and end up claiming discomfort when taking any medication on an empty stomach.

Another factor claimed by patients in wanting to take Synthroid at the same time they have a meal is the lower possibility of forgetting to take it.

It is also shown in the literature that the ideal is to take Synthroid always at the same time, in the same way, on an empty stomach, before breakfast. And above all, take it exactly as prescribed by the doctor.

What can get in the way of Synthroid efficiency?

Here are some factors that may interfere with the effectiveness of the medication:

  • Changing the brand and/or manufacturer of the drug. If you take Synthroid the ideal is to always keep the same
  • Gain or lose weight. As it is an influencing factor, possibly the dose should also be adjusted
  • Taking Synthroid at the wrong time
  • Taking Synthroid immediately after any meal or concomitantly
  • Take with supplements (ideally, wait between 30 min to 1 h)
  • Do not tell your doctor about other medicines you are taking, so that he can check for any interaction and therefore avoid it.
  • Taking stomach medication along with it, such as omeprazole and others known as proton pump inhibitors
  • Taking a higher or even lower dose than recommended and thinking that it is harmless or that it will not change the treatment.

Can eating certain foods interfere with Synthroid efficiency?

Yes, some foods are known to have a negative influence, making the absorption of Synthroid irregular in the body. The following is a list of examples of these foods.

  • Foods that contain soy and cottonseed meal
  • Nuts
  • Orange juice
  • Dietary fibers
  • Iron supplements
  • Calcium supplements
  • Juices enriched with calcium
  • Coffee
  • Cow milk

The exact reason why each of these foods influences Synthroid absorption is not entirely clear.

What are the main side effects of Synthroid?

In general, the most reported are:

  • Fatigue
  • Weight loss
  • Increased appetite
  • Fever
  • Excessive sweat
  • Heat intolerance
  • Some central nervous system disorders (such as headache, anxiety, insomnia, irritability)
  • Tremors, muscle weakness
  • Among others


In this brief guide, we addressed the issue, “can you eat 30 minutes after taking Synthroid?” In addition, we discussed what happens if you eat 30 minutes after taking Synthroid. Finally, we discussed if you can eat 30 minutes after taking Synthroid.


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