Fexofenadine interactions
Overview
Fexofenadine (Allegra) is a non-drowsy antihistamine for allergies. In our database it has 8 known interactions with common medicines and substances: 0 serious, 0 that need caution and 8 minor.
Minor 8 interactions
Doubling up on antihistaminesDiphenhydramine
Doubling up on antihistaminesDoxylamine
Doubling up on antihistaminesHydroxyzine
Doubling up on antihistaminesLoratadine
Doubling up on antihistaminesMeclizine
Doubling up on antihistaminesNyQuil
Doubling up on antihistaminesPromethazine
Doubling up on antihistamines
No known interaction found
Our rules found no interaction between Fexofenadine and: Acetaminophen, Acyclovir, Albuterol, Alcohol, Allopurinol, Alprazolam, Amitriptyline, Amlodipine, Amoxicillin, Amoxicillin-clavulanate, Amphetamine salts, Apixaban, Aripiprazole, Ashwagandha, Aspirin, Atenolol, Atorvastatin, Azithromycin, Baclofen, Birth control pills, Bismuth subsalicylate, Buprenorphine-naloxone, Bupropion, Buspirone, Caffeine, Calcium carbonate, Cannabis, Carvedilol, Celecoxib, Cephalexin, Ciprofloxacin, Citalopram, Clindamycin, Clonazepam, Clonidine, Clopidogrel, Codeine, Colchicine, Creatine, Cyclobenzaprine, DayQuil, Dextromethorphan, Diazepam, Diclofenac, Digoxin, Doxycycline, Duloxetine, Empagliflozin, Escitalopram, Esomeprazole, Estradiol, Excedrin, Famotidine, Finasteride, Fish oil, Fluconazole, Fluoxetine, Furosemide, Gabapentin, Glipizide, Grapefruit juice, Guaifenesin, Hydrochlorothiazide, Hydrocodone, Hydroxychloroquine, Ibuprofen, Insulin, Iron supplements, Isotretinoin, Kratom, Lamotrigine, Levetiracetam, Levofloxacin, Levothyroxine, Lisdexamfetamine, Lisinopril, Lithium, Loperamide, Lorazepam, Losartan, Magnesium, Melatonin, Meloxicam, Metformin, Methocarbamol, Methotrexate, Methylphenidate, Methylprednisolone, Metoprolol, Metronidazole, Mirtazapine, Montelukast, Morphine, Naltrexone, Naproxen, Nicotine, Nitrofurantoin, Omeprazole, Ondansetron, Oseltamivir, Oxycodone, Pantoprazole, Paroxetine, Paxlovid, Phentermine, Phenylephrine, Potassium supplements, Pravastatin, Prednisone, Pregabalin, Probiotics, Propranolol, Pseudoephedrine, Quetiapine, Rivaroxaban, Rosuvastatin, Semaglutide, Sertraline, Sildenafil, Simvastatin, Spironolactone, St. John's wort, Sulfamethoxazole-trimethoprim, Sumatriptan, Tadalafil, Tamsulosin, Tirzepatide, Tizanidine, Topiramate, Tramadol, Trazodone, Turmeric, Valacyclovir, Venlafaxine, Vitamin D, Warfarin, Zinc, Zolpidem.
Add at least two medicines, supplements or alcohol.
Sources
Source: FDA label for Fexofenadine on DailyMed (effective 2026-09), plus the labels of each interacting medicine.
This list covers the 147 medicines and substances in our database. It is not a complete list of every possible interaction. Always tell your doctor and pharmacist about every medicine, supplement and herbal product you take.