Non-sedating H1 antihistamine
Fexofenadine hydrochloride
Brand names: Telfast, Allevia
Adult dose
Dose: Allergic rhinitis: 120mg OD. Chronic urticaria: 180mg OD
Route: PO
Frequency: OD
Paediatric dose
Route: PO
Frequency: BD or OD
Age bands
- 24–72m: 30mg BD
- 72–144m: 30mg BD or 60mg OD
- 144–216m: 120mg OD (rhinitis) / 180mg OD (urticaria)
Clinical pearls
- Truly non-sedating — preferred for elderly and drivers
- Up to 4× standard urticaria dose under specialist (off-label)
Contraindications
- Hypersensitivity
Side effects
- Headache
- Drowsiness (rare)
- Nausea
Interactions
- Antacids (Al/Mg) reduce absorption
Reference: BNFc; BNF; BSACI urticaria guideline; https://bnf.nice.org.uk/drugs/fexofenadine-hydrochloride/. Verify against your local formulary and the latest BNF before prescribing.
Related
Curated clinical cross-links plus same-class fallbacks.
Calculators
Drugs
Pathways
- New-Onset Atrial Fibrillation · ESC 2020 AF Guidelines; NICE NG196
- Hypertensive Emergency · ESC/ESH 2018 Hypertension Guidelines; NICE NG136
- Bradycardia Management · Resuscitation Council UK ABCDE; ESC 2021 Pacing Guidelines
- Ventricular Tachycardia / Fibrillation · Resuscitation Council UK ACLS; ESC 2022 Ventricular Arrhythmia Guidelines
- Syncope Assessment · ESC 2018 Syncope Guidelines; NICE NG109
- Acute Chest Pain · NICE CG95; ESC 2023 ACS Guidelines