{"ok":true,"entry":{"slug":"fexofenadine","kind":"medication","name":"fexofenadine","aliases":["Telfast","Fexodin","Allegra"],"brands_sg":["Telfast","Fexodin","Fexofen","Telfast D"],"class":"second-generation antihistamine","tags":["allergy"],"use_for":"hay fever, hives, itch, runny nose and other allergies","use_after":"once daily per label · when symptoms need it (healthhub)","use_duration":null,"take_with":"water · not fruit juice; 120/180 mg tablets before a meal","pros":["sg 120 mg is general sale list — sold beyond pharmacies","nhs: less likely to make you sleepy than some others","healthhub: generally well tolerated"],"cons":["'non-drowsy' but some still feel quite sleepy (nhs)","fruit juice and antacids cut how much is absorbed","sg 180 mg strength is prescription only (hsa register)"],"dose_note":"us otc drug facts (allegra), adults and children 12 and over: 'take one 180 mg tablet with water once a day; do not take more than 1 tablet in 24 hours'; the 12-hour 60 mg form: 'do not take more than 2 tablets in 24 hours'; nhs: usual dose 120 mg once a day for hay fever, 180 mg once a day for hives; healthhub: 'do not exceed the maximum dose as stated on the medicine label given to you'; as directed on the label or by your pharmacist","dosage":null,"ul_status":null,"sg_class":"pharmacy-only","cautions":["kidney disease — otc label says ask a doctor before use","65 and over — otc label says ask a doctor","pregnant or breastfeeding — healthhub and the otc label say ask first","sleepy or dizzy? nhs advises no driving, cycling or machinery"],"clashes":[{"src":["healthhub_fexo_int","fda_allegra_ant"],"note":"healthhub: separate by at least 2 hours; otc label: do not take at the same time","with":"aluminium or magnesium antacids"},{"src":["healthhub_fexo_int","nhs_fexo_key","fda_allegra_ant"],"food":true,"note":"healthhub: juices may reduce the amount of fexofenadine in your body; nhs and the otc label agree","with":"grapefruit, orange or apple juice"},{"src":["healthhub_fexo_int"],"note":"healthhub: check with a healthcare professional before taking two otc medicines together, to prevent overdosing","with":"other otc medicines containing antihistamines"},{"src":["nhs_fexo_key"],"food":true,"note":"nhs: best not to drink alcohol while taking fexofenadine as it can make you feel sleepy","with":"alcohol"}],"sources":[{"id":"hsa_register","url":"https://data.gov.sg/datasets/d_767279312753558cbf19d48344577084/view","label":"HSA — Listing of Registered Therapeutic Products (open dataset on data.gov.sg, resource d_767279312753558cbf19d48344577084, pulled via datastore_search API; all 7 fexofenadine rows read)","quote":"TELFAST TABLET 120 mg · FEXOFENADINE HCl · General Sale List — FEXODIN FILM COATED TABLET 120MG · General Sale List — TELFAST TABLET 180 mg · Prescription Only — TELFAST D TABLET · Pharmacy Only","accessed":"2026-08-27"},{"id":"hsa_reclass","url":"https://www.hsa.gov.sg/therapeutic-products/registration-of-therapeutic-products/variation-application/reclassification/list-of-reclassified-medicines/","label":"HSA — List of reclassified medicines (forensic classification definitions: POM / P / GSL)","quote":"General Sale List Medicine (GSL): A therapeutic product that can be obtained from any retailer … is indicated for self-limiting, common and easily recognised ailments, and is reasonably safe to be used without medical supervision","accessed":"2026-08-27"},{"id":"healthhub_fexo","url":"https://www.healthhub.sg/medication-devices-and-treatment/medications/fexofenadine","label":"HealthHub (MOH Singapore) — Fexofenadine medication information leaflet (article last reviewed 7 July 2026)","quote":"Fexofenadine is used to relieve or prevent symptoms of hives, hay fever, itch, runny nose and other types of allergies … Do not exceed the maximum dose as stated on the medicine label given to you","accessed":"2026-08-27"},{"id":"healthhub_fexo_use","url":"https://www.healthhub.sg/medication-devices-and-treatment/medications/fexofenadine","label":"HealthHub (MOH Singapore) — Fexofenadine leaflet, 'how should I take' and side-effects sections (same page)","quote":"You may take the medication when necessary to relieve your symptoms … Fexofenadine is generally well tolerated … You are pregnant, planning to become pregnant, or breastfeeding","accessed":"2026-08-27"},{"id":"healthhub_fexo_int","url":"https://www.healthhub.sg/medication-devices-and-treatment/medications/fexofenadine","label":"HealthHub (MOH Singapore) — Fexofenadine leaflet, food and medication interactions section (same page)","quote":"Separate administration of Fexofenadine with aluminium or magnesium containing antacids by at least 2 hours … Do not take grapefruit, orange, or apple juice together with this medication as fruit juices may reduce the amount of Fexofenadine in your body","accessed":"2026-08-27"},{"id":"nhs_fexo_about","url":"https://www.nhs.uk/medicines/fexofenadine/about-fexofenadine/","label":"NHS — About fexofenadine (page last reviewed 22 April 2025)","quote":"Fexofenadine is a non-drowsy antihistamine. It's less likely to make you feel sleepy than some other antihistamines … You can also buy 120mg fexofenadine tablets for adults and children aged 12 years and over from pharmacies and supermarkets","accessed":"2026-08-27"},{"id":"nhs_fexo_key","url":"https://www.nhs.uk/medicines/fexofenadine/about-fexofenadine/","label":"NHS — About fexofenadine, 'Key facts' box (same page)","quote":"Fexofenadine is classed as a non-drowsy antihistamine, but some people still find it makes them feel quite sleepy … It's best not to drink alcohol while you're taking fexofenadine as it can make you feel sleepy","accessed":"2026-08-27"},{"id":"nhs_fexo_how","url":"https://www.nhs.uk/medicines/fexofenadine/how-and-when-to-take-fexofenadine/","label":"NHS — How and when to take fexofenadine (page last reviewed 22 April 2025)","quote":"The usual dose for treating hay fever is: 120mg, taken once a day for adults and children aged 12 years and over … The usual dose for treating hives is 180mg once a day … take them before a meal","accessed":"2026-08-27"},{"id":"nhs_fexo_se","url":"https://www.nhs.uk/medicines/fexofenadine/side-effects-of-fexofenadine/","label":"NHS — Side effects of fexofenadine (page last reviewed 22 April 2025)","quote":"Common side effects of fexofenadine happen in more than 1 in 100 people … Feeling sick … Feeling sleepy … Headaches … Feeling dizzy … Do not drive, ride a bike or operate tools or machinery until you feel better","accessed":"2026-08-27"},{"id":"fda_allegra_dose","url":"https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=81c1dcbb-28b3-4ad5-9f3d-9ccc16ddd173","label":"DailyMed / FDA — ALLEGRA ALLERGY (fexofenadine HCl) film-coated tablet, OTC Drug Facts '24 Hour Directions' (Chattem; label updated 14 April 2026)","quote":"Allegra 24 Hour Directions: adults and children 12 years of age and over take one 180 mg tablet with water once a day; do not take more than 1 tablet in 24 hours","accessed":"2026-08-27"},{"id":"fda_allegra_dose12","url":"https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=81c1dcbb-28b3-4ad5-9f3d-9ccc16ddd173","label":"DailyMed / FDA — ALLEGRA ALLERGY, OTC Drug Facts '12 Hour Directions' (same label)","quote":"Allegra 12 Hour Directions: adults and children 12 years of age and over take one 60 mg tablet with water every 12 hours; do not take more than 2 tablets in 24 hours","accessed":"2026-08-27"},{"id":"fda_allegra_warn","url":"https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=81c1dcbb-28b3-4ad5-9f3d-9ccc16ddd173","label":"DailyMed / FDA — ALLEGRA ALLERGY, OTC Drug Facts 'Warnings' (same label)","quote":"Ask a doctor before use if you have kidney disease … adults 65 years of age and older: ask a doctor … If pregnant or breast-feeding, ask a health professional before use","accessed":"2026-08-27"},{"id":"fda_allegra_ant","url":"https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=81c1dcbb-28b3-4ad5-9f3d-9ccc16ddd173","label":"DailyMed / FDA — ALLEGRA ALLERGY, OTC Drug Facts 'When using this product' (same label)","quote":"When using this product … do not take more than directed … do not take at the same time as aluminum or magnesium antacids … do not take with fruit juices (see Directions)","accessed":"2026-08-27"}],"brand_certs":null,"updated_at":"2026-08-29T16:16:19.87501+08:00"},"disclaimer":"kozen-x is not a medical device and does not give medical advice. it lists what published sources have written down. absence of a record is not the same as safe."}