Zyloric (Allopurinol) in Kenya

Product Summary

Zyloric is a prescription medication containing allopurinol, a xanthine oxidase inhibitor used to manage gout, hyperuricemia (high uric acid), and kidney stones. By reducing uric acid production, it prevents painful joint inflammation, tophi (urate deposits), and complications like renal damage. Available in 100mg and 300mg tablets, it is a first-line treatment for chronic gout in Kenya.

Composition

• Active Ingredient: Allopurinol
  • 100mg tablets (white, round)
  • 300mg tablets (peach, round)
• Inactive Ingredients: Lactose, maize starch, povidone, magnesium stearate.

Key Uses in Kenya

1. Gout Management

• Prevents Flares: Reduces uric acid crystals in joints (target level: <6 mg/dL).
• Tophi Reduction: Shrinks chronic urate deposits over time.
• Dosage: Start at 100mg/day, increase by 100mg weekly until target uric acid is reached (max 800mg/day).

2. Kidney Stone Prevention

• For Uric Acid Stones: 200–300mg/day to lower urinary uric acid.

3. Chemotherapy Support

• Tumor Lysis Syndrome: 600–800mg/day to prevent hyperuricemia during cancer treatment.

How to Use

Dosing Guidelines

Administration

• Take after meals to reduce nausea.
• Hydration: Drink 2–3 liters of water daily to prevent kidney stones.
• Renal Adjustment: Reduce dose if eGFR <50 mL/min (e.g., 100mg/day for eGFR 30–50).

Potential Side Effects

Common

• Nausea, diarrhea, rash.
• Drowsiness, headache.

Serious Risks

• Hypersensitivity Syndrome:
  • Symptoms: Fever, rash, renal failure, hepatitis (discontinue immediately).
  • Risk Factor: HLA-B*5801 allele (common in African/Asian populations).
• Acute Gout Flare: May occur during initiation (combine with colchicine/NSAIDs).
• Blood Disorders: Leukopenia, thrombocytopenia (monitor CBC).
• Hepatotoxicity: Elevated liver enzymes (check LFTs).

Precautions & Interactions

Avoid if:

• Hypersensitivity to allopurinol.
• Acute gout attack (wait until inflammation subsides).

Drug Interactions

• Azathioprine/6-Mercaptopurine: Fatal interaction (reduce dose by 75%).
• Warfarin: Increased bleeding risk (monitor INR).
• Diuretics (e.g., hydrochlorothiazide): Reduce uric acid excretion (adjust allopurinol dose).
• Amoxicillin/Ampicillin: Higher rash risk (avoid concurrent use).

Pregnancy/Breastfeeding

• Category C: Use only if benefits outweigh risks.
• Excreted in breast milk (avoid or monitor infant).

Frequently Asked Questions

1. Is Zyloric available over-the-counter in Kenya?
   No – prescription-only. Available at pharmacies (e.g., Goodlife, Meds) as Zyloric or generics (e.g., Allopurinol).

2. How much does it cost?

   • 100mg: ~KES 50–100 per tablet.
   • 300mg: ~KES 100–200 per tablet.
   • Generics cost 30–50% less.

3. Why start with 100mg for gout?
   Low initiation reduces hypersensitivity risk; titrate based on uric acid levels.

4. Can it cure gout?
   No – it prevents flares by controlling uric acid. Joint damage may persist.

5. Are there Kenyan alternatives?

   • Febuxostat (if allopurinol-intolerant; more expensive).
   • Probenecid (increases uric acid excretion; avoid in renal disease).

6. What if I miss a dose?
   Take when remembered unless near next dose. Never double-dose.

7. Can I take it during a gout attack?
   No – may worsen inflammation. Start after flare resolves (use NSAIDs/colchicine first).