Synthroid

levothyroxine

Brand(s):

• Thyronorm Eltroxin Thyrox

Manufacturer:

• Abbott Laboratories Ltd / GlaxoSmithKline Plc / Macleods Pharmaceuticals Limited

Disease(s):

• Thyroid Deficiency

Known as:

• Eltroxin / Levo-T / Levothroid / Levoxyl / Novothyrox / Synthroid / Unithroid

Levothyroxine Tablet: A Comprehensive Guide

What is Levothyroxine?

Levothyroxine is a synthetic form of thyroxine, a crucial hormone produced by your thyroid gland. This hormone plays a vital role in regulating your metabolism, impacting everything from your energy levels to your heart rate. When your thyroid gland doesn't produce enough thyroxine (a condition called hypothyroidism), levothyroxine steps in to replace it. This medication helps alleviate symptoms of hypothyroidism, such as:

• Slowed speech and thinking
• Fatigue and low energy
• Unexplained weight gain
• Hair loss and dry skin
• Intolerance to cold temperatures
• Goiter (enlarged thyroid gland)

Essentially, levothyroxine helps your body function more efficiently.

Important Considerations Before Taking Levothyroxine

Before starting levothyroxine, it's crucial to inform your healthcare provider about your complete medical history. This includes any existing conditions, such as:

• Angina (chest pain)
• Diabetes
• Heart disease
• High blood pressure
• Low levels of pituitary hormone
• Current weight loss programs or diets
• Prior heart attack
• Allergies to levothyroxine, other thyroid hormones, medications, foods, dyes, or preservatives
• Pregnancy or plans to become pregnant

This information helps your doctor determine the appropriate dosage and monitor for potential interactions.

How to Take Levothyroxine

Levothyroxine is typically taken orally with plenty of water. For optimal absorption, take it on an empty stomach, at least 30 minutes before or 2 hours after eating. Consistency is key; take it at the same time each day. Never increase your dose without consulting your doctor.

Special Instructions for Infants: For infants, the tablet can be crushed and mixed with a small amount (5-10 ml or 1-2 teaspoons) of water, breast milk, or non-soy-based infant formula. Avoid soy-based formulas. Always follow your doctor's instructions carefully.

In case of an overdose, immediately contact a poison control center or emergency room. Remember, this medication is prescribed solely for your use; do not share it with others.

What Happens if I Miss a Dose?

If you miss a dose, take it as soon as you remember. However, if it's nearly time for your next dose, skip the missed dose and continue with your regular schedule. Never double up on doses.

Potential Drug Interactions

Levothyroxine can interact with numerous other medications, supplements, and even some foods. It's vital to provide your doctor with a comprehensive list of everything you're taking, including:

• Amiodarone
• Antacids
• Anti-thyroid medications
• Calcium supplements
• Carbamazepine
• Cholestyramine
• Colestipol
• Digoxin
• Female hormones (birth control pills, etc.)
• Iron supplements
• Ketamine
• Liquid nutrition products (e.g., Ensure)
• Cold and respiratory medications
• Diabetes medications
• Antidepressants
• Weight loss medications or herbal supplements
• Phenobarbital or other barbiturates
• Phenytoin
• Prednisone or other corticosteroids
• Rifabutin
• Rifampin
• Soy isoflavones
• Sucralfate
• Theophylline
• Warfarin

This list isn't exhaustive. Your doctor can assess potential interactions and adjust your medication accordingly.

Monitoring Your Progress While on Levothyroxine

Remember to drink plenty of fluids with each dose to prevent the tablet from getting stuck in your throat. Regular check-ups and blood tests are essential to monitor your response to treatment. It might take several weeks before you see noticeable improvement in your symptoms. If your symptoms persist, consult your doctor. Levothyroxine is often a lifelong medication; do not discontinue it without your doctor's guidance.

Important notes: Levothyroxine can affect blood sugar levels, so those with diabetes should monitor their blood sugar closely. Initial hair loss is possible, but it usually resolves over time. Always inform your surgeon about your levothyroxine use before any surgical procedure.

Potential Side Effects of Levothyroxine

Report these side effects to your doctor immediately:

• Breathing difficulties (wheezing, shortness of breath)
• Chest pain
• Excessive sweating or heat intolerance
• Rapid or irregular heartbeat
• Nervousness
• Skin rash or hives
• Swelling in ankles, feet, or legs
• Tremors

Side effects that usually don't require immediate medical attention (but inform your doctor if they persist or are bothersome):

• Changes in appetite
• Changes in menstrual periods
• Diarrhea
• Hair loss
• Headache
• Sleep disturbances
• Weight loss

This list doesn't encompass all potential side effects. Consult your doctor if you experience any unusual symptoms.

Storage of Levothyroxine

Keep levothyroxine out of children's reach. Store it at room temperature (15-30°C or 59-86°F), away from light and moisture. Keep the container tightly closed and discard any unused medication after the expiration date.