Thyroxine Sodium Tablets 25 mg for Cat

Thyroxine Sodium 25 mg for Cat

Hypothyroidism occurs when the thyroid gland fails to produce sufficient thyroid hormones. Although less common in cats than hyperthyroidism, it may develop:

• After thyroid surgery
• Following radioactive iodine therapy
• Due to autoimmune thyroiditis
• From congenital thyroid dysfunction

Untreated hypothyroidism can lead to lethargy, weight gain, skin issues, and metabolic slowdown. Thyroxine Sodium (Levothyroxine) provides a synthetic version of T4 hormone to restore normal thyroid balance.

How It Works

• Supplies synthetic Levothyroxine (T4)
• Converted in the body to T3, the active hormone
• Regulates metabolism
• Supports heart rate and thermoregulation
• Improves protein synthesis and energy utilization

Most cats show improvement within 2–6 weeks of proper dosing.

Indications

Thyroxine Sodium 25 mcg Tablets are indicated for:

• Primary hypothyroidism
• Post-thyroidectomy hormone replacement
• Iatrogenic hypothyroidism (after hyperthyroid treatment)
• Selected cases of secondary hypothyroidism

Not intended for untreated hyperthyroid cats.

Dosage Guidelines

⚠ Dosage must always be confirmed by a veterinarian based on blood T4 levels.

Standard Starting Dose:

0.05–0.1 mg/kg per day (50–100 mcg/kg daily)

Weight-Based Dosage Table

✔ Blood tests required every 4–6 weeks during initial adjustment.

Administration Instructions

• Administer at the same time daily
• Give on an empty stomach if possible (30–60 minutes before food)
• Tablets may be split if required
• Avoid giving simultaneously with calcium, iron, or soy-based supplements

Consistency is critical for maintaining stable hormone levels.

Expected Improvements

With proper dosing, you may observe:

• Increased energy
• Reduced lethargy
• Improved coat quality
• Normalized weight
• Better thermoregulation
• Improved muscle tone

Most improvements appear within 3–4 weeks.

Possible Side Effects

Thyroxine is generally well-tolerated, but excessive dosing may cause hyperthyroid-like symptoms.

Mild Side Effects:

• Increased thirst
• Increased urination
• Appetite changes
• Restlessness

Signs of Overdose:

• Rapid heart rate
• Weight loss despite appetite
• Hyperactivity
• Tremors
• Panting

If these occur, contact your veterinarian immediately.

Safety Considerations

• Regular T4 blood monitoring required
• Do not abruptly stop medication
• Use caution in cats with heart disease
• Adjust dose carefully in senior cats
• Lifelong therapy is often required

Never adjust dosage without veterinary guidance.

Clinical Support

Veterinary endocrinology studies confirm:

• Levothyroxine effectively normalizes serum T4 levels
• Significant improvement in energy and coat within 4–6 weeks
• Long-term therapy is safe with proper monitoring
• Once-daily dosing is typically sufficient

Thyroxine replacement remains the gold standard therapy for feline hypothyroidism.

FAQ

Is treatment lifelong?
Yes, in most confirmed hypothyroid cases.

How often should blood work be done?
Initially every 4–6 weeks, then every 6–12 months once stable.

Can it be given with food?
Yes, but consistency is important—give the same way each day.