Hepatrombin H

Uses

Heparin sodium is used for:

Atrial fibrillation with embolization:

• Treatment of acute and chronic consumption coagulopathies (disseminated intravascular coagulation);
• Prevention of clotting in arterial and heart surgery;
• Anticoagulant therapy in prophylaxis and treatment of venous thrombosis and its extension;
• (In a low-dose regimen) for prevention of postoperative deep venous thrombosis and pulmonary embolism in patients undergoing major abdomino-thoracic surgery or who for other reasons are at risk of developing thromboembolic disease
• Prophylaxis and treatment of pulmonary embolism;
• Prophylaxis and treatment of peripheral arterial embolism.

Prednisolone eye drops is used for the treatment of steroid-responsive inflammation of the palpebral and bulbar conjunctiva, cornea and anterior segment of the globe.

Prednisolone tablet, Injection is used forAllergy and anaphylaxis: bronchial asthma, drug hypersensitivity reactions, serum sickness, angioneurotic oedema, anaphylaxis.

Respiratory disease: allergic pneumonitis, asthma, occupational asthma, pulmonary aspergillosis, pulmonary fibrosis, pulmonary alveolitis, aspiration of foreign body, aspiration of stomach contents, pulmonary sarcoid, drug induced lung disease, adult respiratory distress syndrome, spasmodic croup.

Rheumatic disorders: rheumatoid arthritis, polymyalgia rheumatica, juvenile chronic arthritis, systemic lupus erythematosus, dermatomyositis, mixed connective tissue disease.

Arteritis/collagenosis: giant cell arteritis/polymyalgia rheumatica, mixed connective tissue disease, polyarteritis nodosa, polymyositis.

Blood disorders: haemolytic anaemia (auto-immune), leukaemia (acute and chronic lymphocytic), lymphoma, multiple myeloma, idiopathic thrombocytopenic purpura.

Cardiovascular disorders: post-myocardial infarction syndrome, rheumatic fever with severe carditis.

Endocrine disorders: primary and secondary adrenal insufficiency, congenital adrenal hyperplasia.

Gastro-intestinal disorders: Crohn's disease, ulcerative colitis, persistent coeliac syndrome (coeliac disease unresponsive to gluten withdrawal), auto-immune chronic active hepatitis, multisystem disease affecting liver, biliary peritonitis.

Infections (with appropriate chemotherapy): helminthic infestations, Herxheimer reaction, infectious mononucleosis, miliary tuberculosis, mumps orchitis (adult), tuberculous meningitis, rickettsial disease.

Muscular disorders: polymyositis, dermatomyositis.

Neurological disorders: infantile spasms, Shy-Drager syndrome, sub-acute demyelinating polyneuropathy.

Ocular disease: scleritis, posterior uveitis, retinal vasculitis, pseudo-tumours of the orbit, giant cell arteritis, malignant ophthalmic Graves disease.

Renal disorders: lupus nephritis, acute interstitial nephritis, minimal change glomerulonephritis.

Skin disorders: pemphigus vulgaris, bullous pemphigoid, systemic lupus erythematosus, pyoderma gangrenosum.

Miscellaneous: sarcoidosis, hyperpyrexia, Behçets disease, immunosuppression in organ transplantation.

Prednisolone is used for the treatment of steroid-responsive inflammation of the palpebral and bulbar conjunctiva, cornea and anterior segment of the globe.

Hepatrombin H is also used to associated treatment for these conditions: Blunt Injuries, Clotting, Coagulopathy, Consumption, Contusions, Disseminated Intravascular Coagulation (DIC), External Hemorrhoid, Inflammation, Inflammatory, non-infectious pruritic dermatosis, Interstitial Cystitis, Pulmonary Embolism, ST Elevation Myocardial Infarction (STEMI), Sprains, Thromboembolism, Thrombosis, Venous, Unstable Angina Pectoris, Venous Thromboembolism, Embolization, Hematomas, Peripheral arterial embolism, Varicosities of the great saphenous vein, Maintenance of patency of IV injection devicesInflammation, Inflammatory Conditions, Ocular Infections, Irritations and Inflammations, Ocular Inflammation, Organ Transplant Rejection

How Hepatrombin H works

Under normal circumstances, antithrombin III (ATIII) inactivates thrombin (factor IIa) and factor Xa. This process occurs at a slow rate. Administered heparin binds reversibly to ATIII and leads to almost instantaneous inactivation of factors IIa and Xa The heparin-ATIII complex can also inactivate factors IX, XI, XII and plasmin. The mechanism of action of heparin is ATIII-dependent. It acts mainly by accelerating the rate of the neutralization of certain activated coagulation factors by antithrombin, but other mechanisms may also be involved. The antithrombotic effect of heparin is well correlated to the inhibition of factor Xa. Heparin is not a thrombolytic or fibrinolytic. It prevents progression of existing clots by inhibiting further clotting. The lysis of existing clots relies on endogenous thrombolytics.

The short term effects of corticosteroids are decreased vasodilation and permeability of capillaries, as well as decreased leukocyte migration to sites of inflammation. Corticosteroids binding to the glucocorticoid receptor mediates changes in gene expression that lead to multiple downstream effects over hours to days.

Glucocorticoids inhibit neutrophil apoptosis and demargination; they inhibit phospholipase A2, which decreases the formation of arachidonic acid derivatives; they inhibit NF-Kappa B and other inflammatory transcription factors; they promote anti-inflammatory genes like interleukin-10.

Lower doses of corticosteroids provide an anti-inflammatory effect, while higher doses are immunosuppressive. High doses of glucocorticoids for an extended period bind to the mineralocorticoid receptor, raising sodium levels and decreasing potassium levels.

Dosage

Hepatrombin H dosage

Intravenous-Prophylaxis of re-occlusion of the coronary arteries following thrombolytic therapy in myocardial infarction

• Adult: 60 U/kg (max: 4,000 U) or a bolus of 5,000 U if streptokinase was used, followed by 12 U/kg/hr (max: 1,000 U/hr) w/ a treatment duration of 48 hr.

Intravenous-

Peripheral arterial embolism, Unstable angina, Venous thromboembolism

• Adult: 75-80 U/kg or 5,000 U (10,000 U in severe pulmonary embolism) IV loading dose followed by 18 U/kg or 1,000-2,000 U/hr continuous infusion. Alternatively, intermittent inj of 5,000-10,000 U 4-6 hrly.
• Child: 50 U/kg loading dose, followed by an infusion of 15-25 U/kg/hr.
• Elderly: Lower dosages may be required.

Subcutaneous-

Prophylaxis of postoperative venous thromboembolism

• Adult: 5,000 U given 2 hr before surgery then 8-12 hrly for 7 days or until the patient is ambulant.

Subcutaneous-

Venous thromboembolism

• Adult: 15,000-20,000 U 12 hrly or 8,000-10,000 U 8 hrly.
• Child: 250 U/kg bid.
• Elderly: Lower dosages may be required.

The initial dosage of Prednisolone may vary from 5 mg to 60 mg daily depending on the disorder being treated. Divided daily dosage is usually used.

The appropriate individual dose must be determined by trial and error and must be re-evaluated regularly according to activity of the disease.

In general, initial dosage shall be maintained or adjusted until the anticipated response is observed. The dose should be gradually reduced until the lowest dose, which will maintain an adequate clinical response is reached.

During prolonged therapy, dosage may need to be temporarily increased during periods of stress or during exacerbations of the disease. When the drug is to be stopped, it must be withdrawn gradually and not abruptly.

Intermittent dosage regimen: A single dose of Prednisolone in the morning on alternate days or at longer intervals is acceptable therapy for some patients. When this regimen is practical, the degree of pituitary-adrenal suppression can be minimized.

Use in children: Corticosteroids cause growth retardation in infancy, childhood and adolescence, which may be irreversible. Treatment should be administered where possible as a single dose on alternate days.

Specific dosage guidelines-

Allergic and skin disorders: initial doses of 5-15 mg daily are commonly adequate.

Collagenosis: Initial doses of 20-30 mg daily are frequently effective. Those with more severe symptoms may require higher doses.

Rheumatoid arthritis: The usual initial dose is 10-15 mg daily. The lowest daily maintenance dose compatible with tolerable symptomatic relief is recommended.

Blood disorders and lymphoma: An initial daily dose of 15-60 mg is often necessary with reduction after an adequate clinical or haematological response. Higher doses may be necessary to induce remission in acute leukaemia.

Adult: Instill one drop into the conjunctival sac two to four times daily. During the initial 24 to 48 hours, the dosing frequency may be increased if necessary. Care should be taken not to discontinue the therapy before completing the course.

Paediatri: Safety and effectiveness in pediatric patients have not been established.

Side Effects

Hypersensitivity reactions (e.g. chills, fever, urticaria, asthma, rhinitis); painful, ischaemic and cyanosed limbs; osteoporosis (in long-term admin), suppression of aldosterone synthesis leading to hyperkalaemia, cutaneous necrosis, delayed transient alopecia, priapism, rebound hyperlipaemia; increased serum concentrations of AST and ALT, prolonged prothrombin time; local irritation, erythema, mild pain, haematoma or ulceration on inj site.

Elevation of intraocular pressure (IOP) with possible development of glaucoma and infrequent optic nerve damage, posterior subcapsular cataract formation and delayed wound healing. Fungal and viral infections of the cornea are particularly may develop coincidentally with long-term applications of steroid.

General side-effects include leucocytosis, hypersensitivity including anaphylaxis, thromboembolism, nausea, and malaise.

Toxicity

In mouse, the median lethal dose is greater than 5000 mg/kg. Another side effect is heparin-induced thrombocytopenia (HIT syndrome). Platelet counts usually do not fall until between days 5 and 12 of heparin therapy. HIT is caused by an immunological reaction that makes platelets form clots within the blood vessels, thereby using up coagulation factors. It can progress to thrombotic complications such as arterial thrombosis, gangrene, stroke, myocardial infarction and disseminated intravascular coagulation. Symptoms of overdose may show excessive prolongation of aPTT or by bleeding, which may be internal or external, major or minor. Therapeutic doses of heparin give for at least 4 months have been associated with osteoporosis and spontaneous vertebral fractures. Osteoporosis may be reversible once heparin is discontinued. Although a causal relationship has not been established, administration of injections preserved with benzyl alcohol has been associated with toxicity in neonates. Toxicity appears to have resulted from administration of large amounts (i.e., about 100–400 mg/kg daily) of benzyl alcohol in these neonates. Its use is principally associated with the use of bacteriostatic 0.9% sodium chloride intravascular flush or endotracheal tube lavage solutions.

The oral LD₅₀ of prednisolone acetate in mice is 1680 mg/kg. Patients experiencing an overdose of oral prednisolone acetate may experience an increased severity in the adverse effects of corticosteroids. Overdose of oral prednisolone acetate may be treated by gastric lavage or inducing vomiting if the overdose was recent, as well as supportive and symptomatic therapy. Chronic overdosage may be treated by dose reduction or treating patients on alternate days. An overdose by the ophthalmic route is not expected to cause problems.

Precaution

Patient with increased risk of bleeding complications, HTN, DM, pre-existing metabolic acidosis. Do not use in catheter lock flushing. Hepatic and renal impairment. Elderly. Pregnancy and lactation.

Shake the bottle well before use. Prolonged use of corticosteroids may result in damage to the optic nerve and defects in vision. If this product is used for longer period of time, intraocular pressure should be routinely monitored.

Caution is necessary when oral corticosteroids, including Prednisolone, are prescribed in patients with the following conditions like-Tuberculosis, Hypertension, Congestive heart failure, Liver failure, Renal insufficiency, Diabetes mellitus or in those with a family history of diabetes, Osteoporosis, Patients with a history of severe affective disorders and particularly those with a previous history of steroid-induced psychoses, Epilepsy, Peptic ulceration, Previous Steroid Myopathy.

Undesirable effects may be minimized by using the lowest effective dose for the minimum period and by administering the daily requirement as a single morning dose on alternate days. Frequent patient review is required to titrate the dose appropriately against disease activity.

Interaction

Enhanced anticoagulant effect with other drugs affecting platelet function or the coagulation system (e.g. platelet aggregation inhibitors, thrombolytic agents, salicylates, NSAIDs, vit K antagonists, dextrans, activated protein C). Decreased anticoagulant effect with gyceryl trinitrate infusion. Increased risk of hyperkalaemia with ACE inhibitors or angiotensin II antagonists.

Hepatic microsomal enzyme inducers: Drugs which can cause liver enzyme induction such as phenobarbitone, phenytoin, rifampicin, rifabutin, carbamazepine, primidone and aminoglutethimide may reduce the therapeutic efficacy of corticosteroids by increasing the rate of metabolism.

Non-steroidal anti-inflammatory drugs: Concomitant administration of ulcerogenic drugs such as indomethacin during corticosteroid therapy may increase the risk of Gl ulceration.

Anticoagulants: Response to anticoagulants may be reduced or, less often, enhanced by corticosteroids.

Vaccines: Live vaccines should not be given to individuals with impaired immune responsiveness. The antibody response to other vaccines may be diminished.

Oestrogens: Oestrogens may potentiate the effects of glucocorticoids and dosage adjustment may be required if oestrogens are added to or withdrawn from a stable dosage regimen.

Other: The desired effects of hypoglycaemic agents (including insulin), anti-hypertensives and diuretics are antagonised by corticosteroids and the hypokalaemic effect of acetazolamide, loop diuretics, thiazide diuretics and carbenoxolone are enhanced.

Volume of Distribution

40-70 mL/min (approximately the same as blood volume) Although heparin does not distribute into adipose tissues, clinicians should use actual body weight in obese patients to account for extra vasculature.

The volume of distribution of the active metabolite, prednisolone, is 0.22/0.7L/kg.

Elimination Route

Heparin must be given parenterally as it is not absorbed through the gastrointestinal mucosa. It is usually given by iv infusion or deep sc injection. The onset of action is immediate after iv injection but can be delayed 20 to 60 minutes following sc injection.

Plasma heparin concentrations may be increased and activated partial thromboplastin times (aPTTs) may be more prolonged in geriatric adults (older than 60 years of age) compared with younger adults.

Prednisolone acetate oral suspension given at a dose equivalent to 15mg prednisolone has a C_max of 321.1ng/hr, a T_maxof 1-2 hours, and an AUC of 1999.4ng*hr/mL. The absorption pharmacokinetics of prednisolone acetate are not significantly different from a comparable dose of prednisolone.

Half Life

1.5 hours.

The plasma half-life of heparin increases from about 60 minutes with a 100 unit/kg dose to about 150 minutes with a 400 unit/kg dose.

Oral prednisolone acetate has a plasma half life of 2-3 hours.

Clearance

Adult Clearance = 0.43 ml/kg/min 25-28 weeks gestation = 1.49 ml/kg/min

Data regarding the clearance of prednisolone acetate is not readily available.

Elimination Route

The drug appears to be removed mainly by the reticuloendothelial system. A small fraction of unchanged heparin also appears to be excreted in urine. Heparin cannot be eliminated by hemodialysis.

Prednisolone acetate is predominantly excreted in the urine.

Pregnancy & Breastfeeding use

Pregnancy Category C. Either studies in animals have revealed adverse effects on the foetus (teratogenic or embryocidal or other) and there are no controlled studies in women or studies in women and animals are not available. Drugs should be given only if the potential benefit justifies the potential risk to the foetus.

Nursing Mothers: Due to its large molecular weight, heparin is not likely to be excreted in human milk, and any heparin in milk would not be orally absorbed by a nursing infant. Benzyl alcohol present in maternal serum is likely to cross into human milk and may be orally absorbed by a nursing infant. Exercise caution when administering Heparin Sodium Injection to a nursing mother.

Pregnancy: Prednisolone Acetate is pregnancy category C. So, this drug should be used during pregnancy only if clearly needed.

Lactation: Corticosteroids are excreted in small amounts in breast milk and infants of mothers taking pharmacological doses of steroids should be monitored carefully for signs of adrenal suppression.

Contraindication

Current or history of heparin-induced thrombocytopenia; generalised or local haemorrhagic tendency, including uncontrolled severe HTN, severe liver insufficiency, active peptic ulcer, acute or subacute septic endocarditis, intracranial haemorrhage or injuries and operations on the CNS, eyes and ears, and in women with abortus imminens; epidural anaesth during birth; locoregional anaesth in elective surgical procedures (in patients receiving heparin for treatment rather than prophylaxis).

Prednisolone (Eye drops) is contraindicated in viral diseases of the cornea, conjunctiva and known hypersensitivity to any of the ingredients of Prednisolone (Eye drops) or other corticosteroids.

Systemic infections unless specific anti-infective therapy is employed. Hypersensitivity to any ingredient. Ocular herpes simplex because of possible perforation.

Special Warning

Pediatric Use: There are no adequate and well controlled studies on heparin use in pediatric patients. Pediatric dosing recommendations are based on clinical experience. Carefully examine all Heparin Sodium Injection vials to confirm choice of the correct strength prior to administration of the drug. Pediatric patients, including neonates, have died as a result of medication errors in which vials have been confused with “catheter lock flush” vials

Use in the elderly: Treatment of elderly patients, particularly if long term, should be planned bearing in mind the more serious consequences of the common side effects of corticosteroids in old age, especially osteoporosis, diabetes, hypertension, hypokalemia, susceptibility to infection and thinning of the skin. Close clinical supervision is required to avoid life-threatening reactions.

May need to increase dose in patients with hyperthyroidism to achieve therapeutic effects.

Acute Overdose

Symptoms: Bleeding (nose bleeds, blood in urine or tarry stools may be noted as the 1st sign of bleeding).

Management: May give protamine sulfate by slow IV infusion over 10 min to treat severe bleeding (1 mg of protamine sulfate neutralises approx 100 U of heparin). Max: 50 mg as a single dose.

A one-time accidental overdose of Prednisolone Ophthalmic Suspension generally will not cause acute problems. Long time overdose may show general side-effects. In accidental overdose sufficient water should be taken to dilute the medication.

Report of acute toxicity and/or death following overdose of glucocorticoids are rare. No specific antidote is available; treatment is supportive and symptomatic. Serum electrolytes should be monitored.

Storage Condition

Store between 20-25° C. Protect from freezing.

Store in a cool, dry place and protect from light. Keep out of the reach of children. Protect from freezing. Shake well before using.

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