Predimax (Prednisolone): A Synthetic Adrenocortical Glucocorticoid

Predimax contains Prednisolone, a synthetic adrenocortical drug primarily possessing glucocorticoid properties. It is widely indicated for its anti-inflammatory and immunosuppressant effects in a variety of rheumatic, allergic, respiratory, hematologic, endocrine, dermatologic, gastrointestinal, and edematous disorders.

How Predimax Works (Pharmacology)

Prednisolone exerts its effects by directly inhibiting the action of the Phospholipase A2 enzyme. This enzyme is crucial for the production of various inflammatory mediators, including Leukotrienes, SRS-A (Slow-Reacting Substance of Anaphylaxis), and Prostaglandins. By inhibiting this enzyme, Prednisolone effectively reduces the inflammatory response in the body. It also suppresses the immune system by reducing the activity and production of lymphocytes and eosinophils.

Pharmacokinetics:

• Absorption: Prednisolone is rapidly and well absorbed from the gastrointestinal (GI) tract following oral administration.
• Protein Binding: It is 70-90% protein-bound in the plasma.
• Elimination: It is eliminated from the plasma with a half-life of 2 to 4 hours.
• Metabolism & Excretion: It is metabolized mainly in the liver and excreted in the urine.

Key Indications & Benefits

Predimax is indicated for a wide range of conditions due to its potent anti-inflammatory and immunosuppressive actions:

• Rheumatic Disorders: Psoriatic arthritis, rheumatoid arthritis, juvenile rheumatoid arthritis, ankylosing spondylitis, acute and subacute bursitis, acute nonspecific tenosynovitis, acute gouty arthritis, post-traumatic osteoarthritis.
• Endocrine Disorders: Primary or secondary adrenocortical insufficiency, congenital adrenal hyperplasia, nonsuppurative thyroiditis, hypercalcemia associated with cancer.
• Dermatologic Diseases: Pemphigus, bullous dermatitis herpetiformis, severe erythema multiforme, exfoliative dermatitis, mycosis fungoides, severe psoriasis.
• Allergic States: Seasonal or perennial allergic rhinitis, bronchial asthma, contact dermatitis, atopic dermatitis, serum sickness, drug hypersensitivity reactions.
• Respiratory Diseases: Symptomatic sarcoidosis, berylliosis, fulminating (severe), aspiration pneumonitis.
• Hematologic Disorders: Idiopathic thrombocytopenic purpura (low platelets), secondary thrombocytopenia, acquired (autoimmune) hemolytic anemia, erythroblastopenia (RBC anemia).
• Edematous States: To induce diuresis (increased urination) or remission of proteinuria (protein in urine) in nephrotic syndrome (without uremia), of idiopathic type or that due to lupus erythematosus.
• Gastrointestinal Diseases: Ulcerative colitis, regional enteritis (Crohn's disease).

Dosage & Administration

The dosage of Predimax varies significantly based on the condition being treated, the patient's age, and the severity of the illness. Always consult a registered physician for medication use.

Adult Dosage:

• Nephrotic Syndrome:
  • Initial: 2 mg/kg/day (maximum 80 mg/day) in divided doses 3 to 4 times/day until urine is protein-free for 3 consecutive days (maximum: 28 days).
  • Followed by: 1 to 1.5 mg/kg/dose given every other day for 4 weeks.
  • Maintenance dose: 0.5 to 1 mg/kg/dose given every other day for 3 to 6 months.
• Anti-inflammatory: 5 to 60 mg per day in divided doses 1 to 4 times/day.
• Acute Asthma: 40-60 mg/day orally in a single daily dose or divided every 12 hours for 3-10 days.
• Allergic Conditions (Tapering Dose Example):
  • Day 1: 10 mg PO before breakfast, 5 mg after lunch and dinner, and 10 mg at bedtime.
  • Day 2: 5 mg PO before breakfast, after lunch, and dinner, and 10 mg at bedtime.
  • Day 3: 5 mg PO before breakfast, after lunch, after dinner, and at bedtime.
  • Day 4: 5 mg PO before breakfast, after lunch, and at bedtime.
  • Day 5: 5 mg PO before breakfast and at bedtime.
  • Day 6: 5 mg PO before breakfast.

Pediatric Dosage:

• Asthma (Acute):
  • 1 year: 10 mg orally every 12 hours.
  • 1 to 4 years: 20 mg orally every 12 hours.
  • 5 to 12 years: 30 mg orally every 12 hours.

  • 12 years: 40 mg orally every 12 hours.

• Asthma (Maintenance):
  • 1 year: 10 mg orally every other day.
  • 1 to 4 years: 20 mg orally every other day.
  • 5 to 12 years: 30 mg orally every other day.

  • 12 years: 40 mg orally every other day.

• Anti-inflammatory: 0.05 to 2 mg/kg/day divided 1 to 4 times/day.
• Immunosuppression: 0.05 to 2 mg/kg/day divided 1 to 4 times/day.

Important Considerations & Warnings

It is crucial to discuss your full medical history with your doctor before taking Predimax.

Contraindications:

• Systemic infections unless specific anti-infective therapy is simultaneously employed.
• Hypersensitivity to any ingredient in the formulation.
• Ocular herpes simplex due to the possible risk of corneal perforation.

Side Effects:

Corticosteroids can cause a wide range of side effects, especially with long-term or high-dose use:

• Fluid and Electrolyte Disturbances: Sodium retention, fluid retention, congestive heart failure (in susceptible patients), potassium loss, hypokalemic alkalosis, hypertension.
• Musculoskeletal: Muscle weakness, steroid myopathy (muscle disease), loss of muscle mass, osteoporosis (bone thinning), vertebral compression fractures, aseptic necrosis of femoral and humeral heads (bone death), pathologic fracture of long bones.
• Gastrointestinal: Peptic ulcer with possible perforation and hemorrhage, pancreatitis, abdominal distention, ulcerative esophagitis.
• Dermatologic: Impaired wound healing, thin fragile skin, petechiae (small red spots) and ecchymoses (bruising), facial erythema (redness), increased sweating, may suppress reactions to skin tests.
• Neurological: Convulsions, increased intracranial pressure with papilledema (cerebral pseudo-tumor - usually after treatment withdrawal), vertigo, headache.
• Endocrine: Menstrual irregularities, development of Cushingoid state (moon face, buffalo hump), suppression of growth in children, secondary adrenocortical and pituitary unresponsiveness (especially during stress like trauma, surgery, or illness), decreased carbohydrate tolerance, manifestations of latent diabetes mellitus, increased requirements for insulin or oral hypoglycemic agents in diabetics.
• Ophthalmic: Posterior subcapsular cataracts, increased intraocular pressure, glaucoma, exophthalmos (bulging eyes).
• Metabolic: Negative nitrogen balance due to protein catabolism.

Pregnancy & Lactation:

• Pregnancy: This medicine is not recommended for use during pregnancy unless considered essential by your doctor. It should only be used if the expected benefit to the mother is greater than any possible risk to the fetus.
• Lactation: Corticosteroids appear in breast milk and could suppress growth, interfere with endogenous corticosteroid production, or cause other unwanted effects in the infant.

Precautions & Warnings:

• Infections:
  • Patients on immunosuppressant doses of corticosteroids should be warned to avoid exposure to chickenpox or measles. If exposed, medical advice should be sought without delay.
  • Corticosteroids may mask some signs of infection, and new infections may appear during their use. There may be decreased resistance and inability to localize infection.
  • Immunization procedures (vaccinations) should generally not be undertaken in patients on corticosteroids, especially high doses, due to possible neurological complications and lack of antibody response. Children on immunosuppressant doses are more susceptible to infections.
• Stress Situations: In patients on corticosteroid therapy subjected to unusual stress (trauma, surgery, illness), an increased dosage of rapidly acting corticosteroids before, during, and after the stressful situation is indicated.
• Ophthalmic Effects: Prolonged use may produce posterior subcapsular cataracts, glaucoma (with possible optic nerve damage), and enhance secondary ocular infections (fungal or viral).
• Fluid/Electrolyte Balance: Average and large doses of hydrocortisone or cortisone can cause elevation of blood pressure, salt and water retention, and increased excretion of potassium.
• Growth in Children: Growth and development in pediatric populations on prolonged corticosteroid therapy should be carefully observed.
• Adrenal Insufficiency: Infants born to mothers who have received substantial doses of corticosteroids during pregnancy should be carefully observed for signs of hypoadrenalism (underactive adrenal glands).

Drug Interactions:

• Reduced Efficacy of Predimax (due to increased metabolism):
  • Aminoglutethimide
  • Antacids
  • Barbiturates
  • Carbamazepine
  • Griseofulvin
  • Mitotane
  • Phenylbutazone
  • Phenytoin
  • Primidone
  • Rifampin
• Digitalis: Predimax reduces potassium in the blood (hypokalemia). If hypokalemia occurs, Digitalis can cause cardiac arrhythmias.
• Immunization: Should be done very carefully (as mentioned in precautions).

Overdose Effects:

• Adverse effects related to Prednisolone overdose normally develop only after prolonged use of doses in excess of the normal physiological requirement.
• Treatment is symptomatic, and where possible, the Prednisolone dose should be reduced gradually to avoid withdrawal symptoms.

Storage Conditions

Store in a cool and dry place, protected from light. Keep out of the reach of children.