Pharmaceutical name Levothyroxine Sodium A thyroid replacement therapy in dogs with hypothyroidism. Features and Benefits Once daily treatment - increases compliance. Highly palatable liquid formulation - makes it easy to administer.RESULTS : Following oral administration of the reference tablet at the dose of 100 g/kg, a maximum plasma concentration of approximately 96.2 nmol/L (baseline endogenous corrected) was reached within 3.77 h.
The usual maintenance dosage is 20 g L-thyroxine/kg once daily. ADMINISTRATION : Remove child-resistant cap and insert oral dosing syringe into the plastic push-in adapter. Invert bottle and gently draw back syringe plunger to the desired dose.Oral Solution for Dogs 1.0 mg/mL 30 mL Each mL of LEVENTA (levothyroxine sodium, USP.) oral solution provides 1 mg synthetic crystalline levothyroxine sodium (L-thyroxine). CAUTION : Federal law restricts this drug to use by or on the order of a licensed veterinarian.
KEEP OUT OF THE REACH OF CHILDREN. FOR ANIMAL USE ONLY Manufactured at: DPT Lakewood, Inc. Lakewood, New Jersey 08701 Distributed by: Merck Animal Health Millsboro, DE 19966 m Made in USA.The following clinical signs of hypothyroidism can be observed in dogs: Metabolic signs: lethargy; lack of endurance; increased sleeping; reduced interest, alertness and excitability; slow heart rate; weak heart beat and pulse; preference for warmth; low body temperature; cool skin; increased body weight.
It increases the rate of energy exchange and the maturation rate of the epiphyses. The clinical diagnosis of hypothyroidism should be completed by evaluation of the thyroid hormone of the dog, i.e., measurement of serum levels of total (or preferably free) thyroxine (T4) and thyroid stimulating hormone (TSH).According to the T4 levels, the veterinarian will decide to adjust the dose rate if needed. Once the dosage suitable to solve the hypothyroidism clinical and hormonal condition of the dog is determined (maintenance dosage serum T4 levels four to six hours post-treatment should be checked every six months.
In less than 10 percent of cases, hypothyroidism is secondary, due to a lack of thyroid stimulating hormone (TSH). TSH is produced by the pituitary gland in the brain. Lack of TSH can occur as a congenital disorder (birth defect) where there is a malformation of the pituitary gland, or as an acquired disorder in.Notify your veterinarian of any other medications or supplements your pet is taking, and also if your pet has had any reactions to previous medications. What should I do if I miss a dose?
INDICATION : Thyroid replacement therapy in dogs with hypothyroidism. Hypothyroidism is the generalized metabolic disease resulting from deficiency of the thyroid hormones, L-thyroxine (T4) and triiodothyronine (T3). LEVENTA oral solution will provide L-thyroxine (T4) as a substrate for the physiologic deiodination to triiodothyronine (T3).If your pet experiences an allergic reaction to the medication, signs may include facial swelling, hives, scratching, sudden onset of diarrhea, vomiting, shock, seizures, pale gums, cold limbs, or coma. If you observe any of these signs, contact your veterinarian immediately.
Dermatologic (skin) signs: flaking of skin (dandruff thickening of skin; increased pigmentation of skin; puffy face; drooping of the upper eyelids; tragic facial expression; dry, coarse, thin or sparse coat; slow regrowth of hair after clipping; retarded turnover of hair.It increases the rate of energy exchange and increases the maturation rate of the epiphyses. Levothyroxine sodium is absorbed rapidly from the gastrointestinal tract after oral administration. Following absorption, the compound becomes bound to the serum alpha globulin fraction.
The conditions at treatment administration (time, relation to feeding, diet) should be standardized. CONTRAINDICATIONS : L-thyroxine therapy is contraindicated in thyrotoxicosis, acute myocardial infarction and uncorrected adrenal insufficiency. Use in pregnant bitches has not been evaluated.Administration of L-thyroxine (T4 identical to the L-thyroxine (T4) secreted endogenously by the normal thyroid gland, will result in complete physiologic thyroid replacement. L-thyroxine (T4) acts to stimulate metabolism, growth, development and differentiation of tissues.
ADVERSE REACTIONS : There are no particular adverse reactions associated with L-thyroxine therapy at the recommended dosage levels. Overdosage will result in the signs of thyrotoxicosis listed under Precautions. PRECAUTIONS : The effects of L-thyroxine therapy are slow to manifest.Flexible dosing - no need for multiple presentations. Caution The effects of L-thyroxine therapy are slow to manifest. Overdosage of any thyroid drug may produce the signs and symptoms of thyrotoxicosis including, but not limited to: polydipsia, polyuria, polyphagia, reduced heat tolerance and hyperactivity or personality change.
Administer with caution to animals with clinically significant heart disease, hypertension or other complications for which a sharply increased metabolic rate might prove hazardous. L-thyroxine therapy is contraindicated in thyrotoxicosis, acute myocardial infarction and uncorrected adrenal insufficiency.Each bottle is provided with a 1 mL dosing syringe to be used for administration. STORAGE INFORMATION : Store refrigerated at 28C (3746F protect from light. After first opening, store at room temperature 2025C (6877F) and use within 2 months.
INFORMATION FOR DOG OWNERS : Hypothyroidism in Dogs: Canine hypothyroidism is usually due to destruction of the thyroid gland. In most cases, the cause is an immune disease called lymphocytic thyroiditis; however, in some cases the cause of this destruction is unknown.Musculoskeletal signs: stiff and slow movements, dragging of front feet, head tilt, disturbed balance, paralysis of one side of the face. Reproductive signs: shortening or absence of estrus (heat lack of libido.
Overdosage of any thyroid drug may produce the signs and symptoms of thyrotoxicosis including, but not limited to: polydipsia, polyuria, polyphagia, reduced heat tolerance and hyperactivity or personality change. Administer with caution to animals with clinically significant heart disease, hypertension or other complications for which a sharply increased metabolic rate might prove hazardous.Do not give two doses at once. What is the most important information I should know? Because every pet reacts differently to this medication, your veterinarian may monitor thyroid hormone levels in the blood every 2-4 weeks while adjusting the dose.
Periodic testing is also necessary while the pet is taking Levothyroxine. It generally takes several weeks of therapy to see an effect. In almost all cases, the pet will need to be on a thyroid supplement such as Levothyroxine for life.For the investigative liquid preparation at a dose of 50 g/kg, the maximum plasma concentration was 60.1 nmol/L (baseline endogenous corrected which was reached within 3.59 h. CONCLUSION : The geometric mean of the relative bioavailability for the liquid/tablet product was 1.1, which suggests that the relative bioavailability of thyroxine following administration of tablet or.
A low total (or free) T4 concentration combined with high TSH concentration is strongly suggested for primary hypothyroidism. PHARMACOLOGY : Levothyroxine sodium acts, as does endogenous. L-thyroxine (T4 to stimulate metabolism, growth, development and differentiation of tissues.If you miss a dose, give it as soon as you remember. If it is almost time for the next dose, skip the one you missed and go back to the regular schedule.
Use in pregnant bitches has not been evaluated. FOR ANIMAL USE ONLY Product Label(s) and MSDS.DOSAGE : The adequate dose rate has to be defined individually for each dog. Treatment should be initiated at a recommended dose rate of 20 g L-thyroxine/kg once daily and re-evaluated every four weeks by monitoring T4 serum levels four to six hours post-treatment.
2013 The Authors. Australian Veterinary Journal 2013 Australian Veterinary Association).With chronic overdosing (taking a slightly higher dose over a long period of time expect to see signs of hyperthyroidism such as an increase in drinking, urinating, eating, activity; seeking cool areas; increased heart rate; panting; restlessness; and behavior changes.
Who should not take it? Not for use in animals hypersensitive (allergic) to it. Use with extreme caution in older or debilitated animals, or those with heart disease, high blood pressure, Addison's disease (hypoadrenocorticism or diabetes.Hypothyroidism usually occurs in middle-aged and older dogs although the condition will sometimes be seen in younger dogs of the larger breeds. Neutered animals of either sex are also frequently affected, regardless of age.