Bilastine (Maxtra / Bilaxten) Dosage
Bilastine 20mg has a simple correct dosage — but there is one important rule that, if missed, significantly reduces efficacy.
THE MOST IMPORTANT RULE — TAKE ON AN EMPTY STOMACH
Food or fruit juice reduces Bilastine absorption by approximately 30%. This is pharmacokinetically proven. Therefore:
- Take at least 30 minutes before food, OR
- Take at least 2 hours after food, OR
- Take at bedtime (bedtime — easiest)
Adult Dose
- 20mg once daily — EMPTY STOMACH
- Duration: 24 hours — next dose same time
Fruit Juice — Avoid
Orange juice, grapefruit juice, and apple juice all reduce Bilastine absorption (P-gp inhibition + absorption competition). Take with water only.
Child Dose
- Paediatric formulations are available — confirm with your doctor
- Do not give adult tablets to children without a doctor's guidance
How to Take
1. Swallow with a glass of water 2. Do NOT take with juice or food 3. Take at the same time every day — establish a routine
Best Time to Take
| Option | Notes |
|---|---|
| Bedtime (Recommended) | Stomach is empty — easy routine — 24hr coverage until morning |
| Morning (empty stomach) | 30 minutes before breakfast |
Missed Dose
Take as soon as remembered. If the next dose is close, skip the missed dose. Never take a double dose.
Dose Summary Table
| Patient | Dose | Timing | Notes |
|---|---|---|---|
| Adult | 20mg once daily | EMPTY STOMACH — bedtime preferred | Keep separate from food/juice |
| Child | Confirm with doctor | Doctor's advice | Paediatric formulation |
The information in this guide is for educational purposes only. Always confirm the dose with your doctor or pharmacist.