Buy Synthroid
synthroid
$46.00
- Active ingredient: Levothyroxine
- Category: Hormone Therapy
- Delivery time: Airmail (14-21 days) | EMS trackable (5-9 days)
- Prescription: Included
- Availability: In Stock
Synthroid (Levothyroxine) tablets in strengths from 25mcg to 200mcg are available to order from our Singapore pharmacy with consistent delivery. This thyroid hormone replacement works by supplementing the body's natural thyroid hormones, helping to restore normal metabolic function and energy levels in individuals with hypothyroidism. It is designed for adults with thyroid hormone deficiency who require stable, precise dosing to maintain optimal thyroid function and overall wellbeing.
Table of contents
- Synthroid (Levothyroxine) Buyer and Patient Handbook in Singapore
- What is Synthroid?
- Who Should Use Synthroid?
- How Does It Work?
- Why Choose Synthroid?
- Dosage, Administration, Lifestyle and Dietary Recommendations
- Recommended Dosage
- How to Take
- Missed Dose
- Overdose
- Special Populations
- Lifestyle & Diet
- Precautions and Warnings
- Drug Interactions
- Potential Side Effects
- Common Side Effects
- Less Common Side Effects
- Serious Side Effects
- Who Should Avoid This Medication?
- Storage Instructions
- Synthroid Alternatives
- Frequently Asked Questions
- How long does it take for Synthroid to start working?
- Can I take Synthroid with coffee?
- Is it safe to travel with Synthroid?
- What should I do if I feel my symptoms are worsening?
- Can I switch from a generic levothyroxine to Synthroid?
- Does Synthroid interact with over-the-counter weight-loss supplements?
- Is it okay to take Synthroid during pregnancy?
- How often should I have my thyroid levels checked?
- Can I crush or split Synthroid tablets?
- Will missing a dose affect my long-term treatment?
- Glossary
- Disclaimer
- Synthroid Properties
- Synthroid Drug Class
- Synthroid Connected Conditions
- Related Tags / Keywords
- How to order Synthroid from our Online Pharmacy
- Reviews
- Write your review
Synthroid (Levothyroxine) Buyer and Patient Handbook in Singapore
What is Synthroid?
Synthroid is a synthetic form of the thyroid hormone thyroxine, classified as a hormone replacement used to treat Hypothyroidism. It restores normal hormone levels, relieving symptoms such as Fatigue, weight gain, and cold intolerance. Synthroid is approved by the Health Sciences Authority (HSA) in Singapore and is available as oral tablets.
Who Should Use Synthroid?
- Adults diagnosed with primary or secondary hypothyroidism
- Individuals after thyroidectomy or radioiodine therapy
- Patients with Hashimoto’s thyroiditis
- Women planning pregnancy who have insufficient thyroid hormone
- Elderly patients whose thyroid function has declined with age
How Does It Work?
Synthroid supplies levothyroxine, which mimics the natural hormone produced by the thyroid gland. After ingestion, the tablet is absorbed in the small intestine and converted to the active form triiodothyronine (T3) in tissues, regulating metabolism, heart rate, and temperature. This “fuel-up” effect restores the body’s energy-production engine, allowing everyday activities to proceed normally. Because it replaces a hormone, misuse can cause excess thyroid activity, so taking the prescribed amount is essential.
Why Choose Synthroid?
Synthroid provides a consistent, high-purity levothyroxine preparation that has been studied extensively for reliable dosing. For patients seeking a brand-name option, it offers stringent quality control and proven stability. Generic levothyroxine is also available in Singapore and is clinically equivalent, offering a lower-cost alternative when price is a consideration.
Dosage, Administration, Lifestyle and Dietary Recommendations
Recommended Dosage
| Strength (µg) | Typical Starting Dose* | Maintenance Range |
|---|---|---|
| 25 mcg | 25 mcg daily | 25-125 mcg |
| 50 mcg | 25-50 mcg daily | 50-175 mcg |
| 75 mcg | 25-50 mcg daily | 75-200 mcg |
| 100 mcg | 50 mcg daily | 100-250 mcg |
| 125 mcg | 75 mcg daily | 125-300 mcg |
| 200 mcg | 100 mcg daily | 150-350 mcg |
*Starting dose is individualized based on age, weight, cardiac history, and TSH level.
How to Take
- Swallow the tablet whole with a full glass of water.
- Take it in the morning on an empty stomach, at least 30 minutes before breakfast or any other medication.
- Remain seated or standing for a few minutes after swallowing to reduce the risk of esophageal irritation.
Missed Dose
If you forget a dose, take it as soon as you remember provided it is at least 4 hours before the next scheduled dose. If the next dose is due soon, skip the missed one and resume your normal schedule-do not double-dose.
Overdose
Symptoms of excess levothyroxine include rapid heartbeat, tremor, Anxiety, and heat intolerance. If you suspect an overdose, seek urgent medical attention or call Singapore’s 995 emergency service.
Special Populations
- Elderly: Start with a lower dose (e.g., 25 mcg) and titrate slowly to avoid cardiac stress.
- Pregnant women: Thyroid hormone requirements often increase; regular TSH monitoring is essential.
- Renal or hepatic impairment: No dose adjustment is typically required, but monitor thyroid function closely.
Lifestyle & Diet
- Food interactions: Avoid taking calcium or iron supplements, antacids, or soy products within 4 hours of your dose as they can reduce absorption.
- Grapefruit: No significant interaction, but maintain consistent intake of fruit juices.
- Alcohol: Moderate consumption is acceptable; heavy drinking may affect thyroid metabolism.
Precautions and Warnings
- Cardiac disease: Initiate therapy at low doses and increase gradually; uncontrolled hyperthyroidism can precipitate arrhythmias.
- Adrenal insufficiency: Do not increase thyroid hormone without adequate glucocorticoid replacement.
- Allergy: Avoid if you are hypersensitive to levothyroxine or any tablet excipients.
Drug Interactions
| Interacting Drug/Class | Interaction Risk | Management |
|---|---|---|
| Calcium carbonate, iron salts | Decreases absorption | Separate by ≥4 h |
| Antithyroid agents (e.g., propylthiouracil) | Opposes effect | Adjust dose, monitor TSH |
| Antidepressants (SSRIs) | May alter TSH levels | Check thyroid function regularly |
Potential Side Effects
Common Side Effects
- Headache
- Fatigue (during dose adjustment)
- Weight fluctuation
- Mild heart palpitations
Less Common Side Effects
Serious Side Effects
- Rapid or irregular heartbeat
- Chest Pain or shortness of breath
- Severe anxiety or tremor
- If any of these occur, contact a healthcare professional immediately.
Who Should Avoid This Medication?
- Patients with untreated adrenal insufficiency
- Individuals with acute myocardial infarction or uncontrolled Angina
- Those with known hypersensitivity to levothyroxine or tablet ingredients
Storage Instructions
- Keep tablets in the original blister pack, tightly closed.
- Store at room temperature (15-30 °C); avoid high humidity.
- Protect from light and moisture; keep out of reach of children.
Synthroid Alternatives
| Name | Class | Key Difference |
|---|---|---|
| Eltroxin | Levothyroxine (generic) | Lower price, same potency |
| Thyroxine (local generic) | Levothyroxine | Same molecule, different excipients |
| Armour Thyroid | Natural desiccated thyroid | Contains T4 and T3; different dosing ratio |
Frequently Asked Questions
How long does it take for Synthroid to start working?
Typically 1-2 weeks for noticeable symptom improvement, but full biochemical stabilization may require 4-6 weeks.
Can I take Synthroid with coffee?
Yes, coffee does not significantly affect absorption, but avoid taking the tablet with a large amount of coffee within 30 minutes of dosing.
Is it safe to travel with Synthroid?
Absolutely; keep tablets in your carry-on, store them in their original packaging, and maintain the same dosing schedule across time zones.
What should I do if I feel my symptoms are worsening?
First, check that you are taking the medication exactly as prescribed. If symptoms persist, schedule a thyroid function test with your healthcare provider.
Can I switch from a generic levothyroxine to Synthroid?
Yes, but dosage may need slight adjustment because of formulation differences; monitor TSH after the switch.
Does Synthroid interact with over-the-counter weight-loss supplements?
Many contain calcium or iron, which can impair levothyroxine absorption; separate their intake by at least 4 hours.
Is it okay to take Synthroid during pregnancy?
Maintaining adequate thyroid hormone is crucial for fetal development; Synthroid is considered safe when dosed appropriately and monitored.
How often should I have my thyroid levels checked?
Initially every 6-8 weeks after dose changes, then at least annually once stable.
Can I crush or split Synthroid tablets?
Do not crush; split only if the tablet is scored and your doctor advises a lower dose.
Will missing a dose affect my long-term treatment?
Occasional missed doses are unlikely to cause major issues; resume the regular schedule promptly and avoid double-dosing.
Glossary
- TSH (Thyroid-Stimulating Hormone): Blood marker used to gauge thyroid hormone levels; high TSH indicates under-replacement, low TSH suggests excess hormone.
- Bioequivalence: Demonstrates that two products deliver the same amount of active ingredient into the bloodstream.
- Desiccated thyroid: A natural thyroid extract containing both T4 and T3, differing from pure levothyroxine.
Disclaimer
The information provided here is for general educational purposes only and does not replace professional medical advice. Off-label use, dosage changes, or combination with other medicines should only be undertaken after consultation with a qualified healthcare provider. Our online pharmacy service supplies licensed medicines in Singapore, but the ultimate responsibility for safe use rests with the reader. Always seek personalized guidance from your doctor or pharmacist.
Synthroid Properties
- Original Manufacturer: AbbVie
- Clinical use: Used to treat hypothyroidism and as thyroid hormone replacement.
- Spectrum of activity: Thyroid hormone replacement therapy.
- Mechanism of action: Replaces or provides more thyroid hormone, which the thyroid gland cannot make enough of on its own.
- Classification: Thyroid hormone
- Recommended Dosage: Dose varies based on age, weight, and severity of hypothyroidism.
- Basic Side Effects: Insomnia, Increased appetite, Tremors
- Moderate Side Effects: Diarrhea, Palpitations, Weight loss
- Serious Side Effects: Heart problems, Bone loss
Synthroid Drug Class
Synthroid Connected Conditions
Related Tags / Keywords
How to order Synthroid from our Online Pharmacy
To order Synthroid | Levothyroxine on our online pharmacy, all you need to do is select the required dosage and quantity of pills above. The cost of the selected pack will appear automatically. Next, add the chosen amount to your cart by clicking the Add to Cart button. You can either continue shopping for more medications or head to the checkout. At the Checkout, finalize your purchase through our secure payment gateway.
Synthroid / Levothyroxine pills are made using high-quality generic ingredients and are subject to strict quality control in line with WHO and Health Sciences Authority (HSA) standards. However, please note that Synthroid pills are dispatched from outside Singapore due to prescriptions issued overseas.
Disclaimer: The content on this website is provided solely for informational purposes and is not intended to replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with any questions or concerns regarding your health, and never disregard or delay seeking professional advice based on the information presented here. Use of this website does not create a doctor-patient relationship, and in the event of a medical emergency, please contact your local emergency services immediately. Our website assumes no responsibility or liability for any errors or omissions in the content provided.
Reviews
Just started Synthroid 50mcg three weeks ago for Hashimoto's. The energy boost is real, finally not sleeping through alarms. BUT, the anxiety is through the roof. Full panic attacks sometimes, especially in the afternoon. Tried taking it at 4 AM then going back to sleep, seems to dampen the jitters a bit when I finally wake up. Totally forget taking it within an hour of coffee; instant heart race.
Been on Levothyroxine for 12 years, switched to Synthroid (112mcg) two years back because the generic was too inconsistent. The key is strict routine. Set an alarm for 3 AM, take the pill with just water, then blackout until 6 AM coffee. If you eat *anything* before that 60-minute window, you might as well skip the dose. Bloods have been perfect since I got this system down. Only complaint is the occasional hair shedding.
Initial side effects were brutal. Brain fog was worse than before, and the headaches felt like pressure behind the eyes. Doctor started me on 25mcg. Felt almost hyper the first two weeks, then crashed. My nurse told me to keep a glass of water next to the bed and take it before my feet hit the floor; less chance of forgetting the full 60-minute fast. It's slowly helping the fatigue, but my skin is suddenly super dry.
Synthroid finally fixed my joint pain, that dull ache in my knees is gone. However, it made my digestion a mess. Constant bloating and constipation, even with increased fiber. One of the pharmacists here advised me to take a low dose probiotic two hours *after* my dose, and that seemed to balance things out slightly. It's a huge relief to feel warmer, though. No more feeling freezing in tropical weather.
Taking the highest dose (200mcg). Works fine for my TSH levels, they are finally suppressed. But the sleep pattern is terrible. I wake up wide awake at 2 AM every day, no matter how tired I am. I tried splitting the dose, half in the morning and half pre-bed, but my doctor warned against it because absorption is so tricky. So now I just take some magnesium before bed to try and manage the induced insomnia. Better TSH than being exhausted.
I've been adjusting doses between 75mcg and 100mcg for months. The 100mcg makes me feel almost normal-sharp focus, good mood. But it triggers massive acid reflux immediately, even waiting an hour. The 75mcg is manageable for my stomach, but I get the classic brain Zaps and afternoon dip. It's a constant balance of feeling functional versus feeling terrible under the sternum. Really difficult to find that sweet spot absorption.
Five years on 125mcg. It maintains my weight better than anything else; that sluggish metabolism is GONE. But my hair texture completely changed; it's much drier and breaks easily now. The trick my specialist taught me? Do NOT take calcium or iron supplements anywhere near the Synthroid dose. Need to separate them by at least four hours, or it completely blocks the T4 absorption. Took me ages to figure that out.
My periods became regular again, a huge plus I wasn't expecting. Downside: my resting heart rate went up 10 beats, and I get heart palpitations if I exert myself too much. I'll take it with a sip of water, go back to my phone, and maybe sip more water before starting my day. Make sure you check your batch numbers if you switch pharmacy brands, the binders sometimes cause allergic reactions, or so I've read.