HepBest Tablets — Tenofovir Alafenamide 25 mg (30 Tabs) Mylan

HepBest is a high-tech tablet form with carefully balanced components:

• Active Compound: Tenofovir alafenamide fumarate — 25 mg in each tablet. This is a prodrug that is activated directly inside the affected liver cells.
• Excipients: Lactose monohydrate, microcrystalline cellulose (MCC), croscarmellose sodium, and magnesium stearate. These substances ensure the stability of the drug and its gradual release.
• Film Coating: Contains polyvinyl alcohol, titanium dioxide, talc, and yellow iron oxide, which protects the active substance from oxidation and sunlight.

Pharmacodynamics: Tenofovir alafenamide is a potent inhibitor of hepatitis B virus (HBV) reverse transcriptase. Once in the body, it penetrates hepatocytes, where it is converted into active diphosphate. This component mimics the natural elements of the virus's DNA and is incorporated into its genetic code, causing immediate chain termination and stopping viral replication.

Pharmacokinetics: The main feature of HepBest is its targeted delivery. The active substance remains stable in blood plasma much longer than tenofovir disoproxil (TDF). This allows for a significant reduction in the working dose while achieving a higher concentration of the medicine inside the liver. Elimination occurs primarily through the intestines and to a minor extent through the kidneys.

HepBest 25 mg is a specialized agent prescribed for the following clinical conditions:

• 🔹 Chronic Hepatitis B: Therapy for adult patients with confirmed viral replication, persistently elevated ALT levels, or signs of liver fibrosis.
• 🔹 Adolescent Therapy: Treatment of adolescents aged 12 years and older weighing more than 35 kg diagnosed with chronic viral hepatitis B.
• 🔹 Risk Group Patients: Optimal for individuals over 60 years old, as well as patients with comorbid bone pathologies (osteoporosis, osteopenia) or chronic kidney disease.

To achieve a stable antiviral effect, it is critical to follow the administration regimen:

• Standard Dosage: Take 1 tablet (25 mg) once daily.
• Relation to Food: The tablet must be taken with food. This is critically important for maximum absorption and efficacy of the drug.
• Regularity: Try to take the drug at the same time each day. If you miss a dose by less than 18 hours, take it immediately. If more than 18 hours have passed, simply wait for the next scheduled dose.
• Duration: Treatment is usually long-term (years). The decision to discontinue can only be made by a doctor based on HBeAg seroconversion data.

Despite its high safety profile, the drug has strict limitations:

• ⛔ Allergic Reactions: Hypersensitivity to tenofovir alafenamide or any other component of the tablet.
• ⛔ Severe Renal Impairment: Not recommended for patients with a creatinine clearance below 15 mL/min (except for those on permanent hemodialysis).
• ⛔ Age Restrictions: Children under 12 years of age or weighing less than 35 kg (safety for this group has not been studied).
• ⛔ Lactose Intolerance: Due to the presence of lactose in the composition, the drug is contraindicated for individuals with rare hereditary metabolic disorders.

HepBest may interact with other medications, requiring caution during combined therapy:

• ❌ Anticonvulsants: Carbamazepine, phenytoin, and phenobarbital can significantly reduce the efficacy of HepBest.
• ❌ Antituberculars: Rifampicin and rifabutin accelerate the elimination of the drug, reducing its concentration to ineffective levels.
• ❌ St. John's Wort: Any dietary supplements or teas containing St. John's Wort are strictly prohibited during treatment.
• ❌ Other Antivirals: Must not be combined with tenofovir disoproxil or adefovir.
• ⚠️ NSAIDs: Taking high doses of pain relievers (ibuprofen, naproxen) should be coordinated with a doctor due to the strain on the kidneys.

The use of the drug during reproductive planning has specific considerations:

• Pregnancy: Human clinical trial data are limited. Animal studies have not shown negative effects on the fetus; however, HepBest is prescribed to pregnant women only when the benefit to the mother undeniably outweighs the risks to the child.
• Breastfeeding: Tenofovir has been shown to pass into breast milk. To avoid drug exposure to the infant and eliminate the risk of hepatitis B transmission, discontinuation of lactation is recommended during the treatment period.
• Contraception: Patients of reproductive age are recommended to use reliable methods of contraception during therapy.

HepBest has an excellent safety profile, but in rare cases, the following reactions may occur:

• 🟢 General: Most commonly — headache, mild nausea, and fatigue.
• 🟡 Digestion: Diarrhea, vomiting, epigastric discomfort, or bloating. These symptoms usually disappear on their own within 7-10 days.
• 🟡 Dermatology: Skin rash or itching (observed in less than 2% of patients).
• 🟠 Biochemistry: Increased levels of lipase or ALT enzymes (often a sign that the immune system has begun to fight the virus).
• ⚠️ Urgent Care: If you feel severe muscle pain, coldness in the extremities, or shortness of breath, these may be signs of lactic acidosis (an extremely rare complication).

In case of accidental intake of a large dose of HepBest (several times the daily dose), immediate measures must be taken:

• Symptoms: Intensification of the aforementioned side effects, severe nausea, dizziness.
• First Aid: Gastric lavage and administration of activated charcoal or other sorbents.
• Treatment: No specific antidote exists. Symptomatic therapy is provided in a hospital setting.
• Dialysis Efficacy: Tenofovir is effectively removed by hemodialysis (extraction coefficient of approximately 54%).

Compliance with storage rules ensures the preservation of the tablets' medicinal properties:

• 🌡️ Temperature: Store in a dry place at temperatures between 15°C and 30°C. Avoid sharp changes in humidity.
• 📦 Container: Always tightly close the lid of the original bottle.
• 💧 Desiccant: There is a silica gel packet inside the bottle. Do not remove or discard it until all tablets are used — it protects them from degradation.
• 👶 Safety: Store in a dark place out of reach of children and pets.