Safely Buy Synthroid ( Levothyroxine ) from Canada Prescriptions Plus.

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Formulation : Tablet
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Synthroid is a thyroid medication used to treat hypothyroidism. This medication is also used for those who need surgery and radioiodine therapy to manage well-differentiated thyroid cancer.

Levothyroxine is a hormone produced by your thyroid gland that helps balance thyroid levels for those who do not produce enough of this hormone. This allows Synthroid to help reduce symptoms of hypothyroidism by regulating your body’s energy and metabolism.

This thyroid medication is a first-line treatment for hypothyroidism that helps manage and regulate thyroid hormones. After a few weeks of Synthroid treatment patients should see an improvement in symptoms like water retention and low energy.

Uses and Dosage

The dose of Synthroid prescribed will vary depending on the individual being treated. Follow all your doctor’s instructions and read packaging labels carefully to ensure the best results.

  • Swallow tablets whole
  • Take dose 30 to 60 minutes before breakfast
  • Take at the same time each day
  • Most adults with hypothyroidism take a starting dose of 1.6mcg per kg daily
  • Doses should be titrated by 12.5 to 25mcg every 4 to 6 weeks until an effective dose is reached
  • Adults should not take more than 200 to 300mcg daily
  • Geriatric patients and those at risk for atrial fibrillation or with cardiac disease should start at a lower dosage and increase every 6 to 8 weeks until the desired effect is reached
  • Doses for children are determined by weight and may change if your child’s weight changes
  • Symptoms may take several weeks to improve
  • Continue treatment even if you feel well
  • Store at room temperature away from moisture and heat
  • Keep away from children and pets

Side Effects

Synthroid may cause some side effects to develop while regulating your thyroid hormone levels. Speak with your doctor for more information regarding any symptoms that you may have when using levothyroxine.

Common Synthroid side effects:

  • Chest pain, irregular heartbeats
  • Shortness of breath
  • Headache, leg cramps, muscle pain or weakness
  • Tremors, feeling nervous or irritable, trouble sleeping
  • Increased appetite
  • Feeling hot
  • Weight loss
  • Changes in your menstrual periods
  • Diarrhea
  • Skin rash, partial hair loss

Side effects may be more likely to occur in older adults who take Synthroid.

Serious Side Effects

Some more serious adverse effects may occur when taking levothyroxine. Stop using Synthroid and contact your doctor right away if you develop any of the following symptoms:

  • Fast or irregular heartbeats
  • Chest pain, pain spreading from your jaw or shoulder
  • Shortness of breath
  • Fever, hot flashes, sweating
  • Tremors, if you feel unusually cold
  • Weakness, tiredness, insomnia
  • Memory problems, feeling depressed or irritable
  • Headache, leg cramps, muscle aches
  • Feeling nervous or irritable
  • Dryness of your skin or hair, hair loss
  • Irregular menstrual periods
  • Vomiting, diarrhea, appetite changes, weight changes

Allergic Reactions

Levothyroxine is a naturally occurring hormone in your body, so anyone can take it, but you may react to one of the listed tablet ingredients. If you notice any signs of an allergic reaction, stop using Synthroid and call your doctor.

Synthroid allergy symptoms may include:

  • Hives
  • Difficulty breathing
  • Swelling of face, lips, tongue, or throat


Synthroid is not designed to be used as an obesity or weight problem treatment. Dangerous reactions or death could occur from misusing levothyroxine, especially if taken at the same time as other weight-loss medications or appetite suppressants.

Some foods can impact your body’s ability to absorb levothyroxine. Avoid grapefruit juice, infant soy formula, soybean flour, cotton seed meal, walnuts, and foods high in fiber while taking Synthroid.

Synthroid may not be a suitable or safe medication for you to take if you have any of the following:

  • Untreated or uncontrolled adrenal gland disorder
  • Thyrotoxicosis
  • Recent or current heart attack symptoms

To ensure your safety when taking this medication, tell your doctor if you have ever had any of the following:

  • Thyroid nodule
  • Heart disease, blood clot, or blood-clotting disorder
  • Diabetes
  • Kidney disease
  • Anemia
  • Osteoporosis or low bone mineral density
  • Problems with your pituitary gland
  • Any food or drug allergies

Tell your doctor if you have recently received radiation therapy with iodine for thyroid cancer so they can prescribe your dosage strength accordingly.

Do not stop taking Synthroid without first speaking to your doctor if you become pregnant during treatment. Low thyroid levels during pregnancy can be dangerous for both mother and baby, but your dose may need adjustments.

Tell your doctor if you are breastfeeding because they may need to change your dosage strength while you are nursing.

Some other drugs may increase or decrease the effects of levothyroxine if taken simultaneously. Avoid wait four hours before or after taking Synthroid to take any of the following medications:

  • Calcium carbonate
  • Cholestyramine, colesevelam, colestipol
  • Ferrous sulfate
  • Sucralfate
  • Sodium polystyrene sulfonate
  • Stomach acid reducer (esomeprazole, lansoprazole, omeprazole, and others)
  • Antacids containing aluminum or magnesium (gaviscon, maalox, milk of magnesia, and others)

Do not give Synthroid to any child without advice from a doctor.

Form and Strength

This hypothyroidism medication is available in tablet form.

Synthroid tablet strengths:

  • 25mcg
  • 50mcg
  • 75mcg
  • 88mcg
  • 100mcg
  • 112mcg
  • 125mcg
  • 127mcg
  • 150mcg
  • 175mcg
  • 200mcg
  • 300mcg

All the Synthroid tablet strengths are available in quantities of 90.


Does Synthroid cause weight gain or loss?

A common side effect of using Synthroid is slight weight loss. Weight gain is not usually reported since the weight patients tend to lose is mostly water due to edema caused by hypothyroidism. As Synthroid regulates your thyroid hormone levels, symptoms related to the condition should improve, such as weight gain.

What can I eat for breakfast after taking levothyroxine?

Most foods are safe to eat 30 to 60 minutes after taking your dose of Synthroid. There are, however, a few food products that can make it harder for your body to absorb levothyroxine. These foods include grapefruit juice, soy, walnuts, and high-fiber foods. Speak with your doctor for more specific and personalized guidance.



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0.025mg, 0.05mg, 0.075mg, 0.088mg, 0.15mg, 0.100mg, 0.112mg, 0.125mg, 0.137mg, 0.175mg, 0.200mg, 0.300mg

Quantities Available:

45, 60, 90