Pharmaceutical companies market the same active ingredients under different brand names in different regions for a variety of reasons: existing trademark conflicts, local marketing strategies, regulatory naming conventions, and regional acquisitions. While the generic name (International Nonproprietary Name, or INN) remains consistent worldwide, the brand name can vary dramatically.
For example, the popular pain reliever acetaminophen is known by that generic name in the US, but the INN is paracetamol, which is used as both the generic and common name in the EU, UK, and Australia. The brand name also differs: Tylenol in the US, Panadol in the UK and Australia, and Efferalgan in France.
Understanding these equivalents is critical for travelers who run out of a medication abroad, expatriates establishing new healthcare routines, and anyone purchasing medications internationally. Always verify the generic (INN) name to ensure you are getting the correct medication.
| Generic Name (INN) | US Brand | EU/UK Brand | AU Brand | Notes |
|---|---|---|---|---|
| Acetaminophen / Paracetamol | Tylenol | Panadol, Calpol | Panadol, Panamax | Same drug; "acetaminophen" is US adopted name, "paracetamol" is INN |
| Ibuprofen | Advil, Motrin | Nurofen, Brufen | Nurofen, Herron Blue | Widely available OTC in all regions |
| Naproxen | Aleve, Naprosyn | Naprosyn, Feminax | Naprogesic, Naprosyn | OTC in lower doses; Rx in higher doses |
| Aspirin (Acetylsalicylic acid) | Bayer, Ecotrin | Aspirin, Aspegic | Aspirin, Cartia | Brand "Aspirin" is genericized in many countries |
| Diclofenac | Voltaren, Cataflam | Voltarol, Dicloflex | Voltaren, Fenac | Topical and oral forms available |
| Celecoxib | Celebrex | Celebrex, Celecoxib | Celebrex | Prescription-only COX-2 inhibitor |
| Generic Name (INN) | US Brand | EU/UK Brand | AU Brand | Generation |
|---|---|---|---|---|
| Loratadine | Claritin | Clarityn | Claratine | 2nd generation (non-drowsy) |
| Cetirizine | Zyrtec | Zirtek, Reactine | Zyrtec, Zentop | 2nd generation |
| Fexofenadine | Allegra | Telfast, Allegra | Telfast | 2nd generation |
| Desloratadine | Clarinex | Aerius, Neoclarityn | Aerius | 2nd generation (loratadine metabolite) |
| Diphenhydramine | Benadryl | Benadryl, Nytol | Benadryl, Unisom | 1st generation (sedating) |
| Chlorphenamine | Chlor-Trimeton | Piriton | Chor-Tripolon | 1st generation (sedating) |
| Azelastine (nasal spray) | Astelin, Astepro | Allergodil | Azep, Astelin | Nasal antihistamine |
| Generic Name (INN) | US Brand | EU/UK Brand | AU Brand | Use |
|---|---|---|---|---|
| Omeprazole | Prilosec | Losec, Mepradec | Losec, Maxor | Proton pump inhibitor (PPI) |
| Pantoprazole | Protonix | Protium, Controloc | Somac, Pantoloc | PPI |
| Esomeprazole | Nexium | Nexium, Emozul | Nexium | PPI |
| Ranitidine | Zantac | Zantac | Zantac | H2 blocker (withdrawn in many markets due to NDMA contamination — check current status) |
| Famotidine | Pepcid | Pepcid, Famodil | Pepcidine | H2 blocker |
| Loperamide | Imodium | Imodium | Imodium, Gastro-Stop | Anti-diarrheal |
| Ondansetron | Zofran | Zofran, Ondemet | Zofran, Ondaz | Anti-nausea (prescription) |
| Calcium carbonate | Tums | Rennie, Tums | Mylanta, Rennie | Antacid |
| Generic Name (INN) | US Brand | EU/UK Brand | AU Brand | Notes |
|---|---|---|---|---|
| Pseudoephedrine | Sudafed | Sudafed, Nurofen Cold & Flu | Sudafed, Codral | Behind-counter in US and AU; restrictions vary in EU |
| Guaifenesin | Mucinex | Robitussin, Chesty Cough | Bisolvon, Robitussin | Expectorant |
| Dextromethorphan | Robitussin DM, Delsym | Robitussin, Benylin | Robitussin, Bisolvon Dry | Cough suppressant |
| Phenylephrine | Sudafed PE | Sudafed, Galpseud | Sudafed PE, Demazin | Oral decongestant (less effective than pseudoephedrine) |
| Oxymetazoline | Afrin | Afrin, Otrivine | Otrivin, Sudafed Nasal | Nasal spray decongestant; do not use >3 days |
| Generic Name (INN) | US Brand | EU/UK Brand | AU Brand | Class |
|---|---|---|---|---|
| Amoxicillin | Amoxil | Amoxil | Amoxil, Cilamox | Penicillin |
| Amoxicillin + Clavulanate | Augmentin | Augmentin, Co-Amoxiclav | Augmentin, Clamoxyl | Penicillin + beta-lactamase inhibitor |
| Azithromycin | Zithromax, Z-Pak | Zithromax, Azithromycin | Zithromax, Zedd | Macrolide |
| Ciprofloxacin | Cipro | Ciproxin | Ciproxin, Ciloxan | Fluoroquinolone |
| Doxycycline | Vibramycin, Doryx | Vibramycin, Doxyval | Doryx, Doxy | Tetracycline |
| Clarithromycin | Biaxin | Klaricid | Klacid | Macrolide |
| Metronidazole | Flagyl | Flagyl, Metrogyl | Flagyl, Metrogyl | Nitroimidazole |
| Generic Name (INN) | US Brand | EU/UK Brand | AU Brand | Drug Class |
|---|---|---|---|---|
| Atorvastatin | Lipitor | Lipitor | Lipitor, Atorvastatin Sandoz | Statin (cholesterol) |
| Rosuvastatin | Crestor | Crestor | Crestor | Statin |
| Simvastatin | Zocor | Zocor | Zocor, Simvar | Statin |
| Lisinopril | Zestril, Prinivil | Zestril, Carace | Zestril, Lispril | ACE inhibitor |
| Amlodipine | Norvasc | Istin, Norvasc | Norvasc, Amdepin | Calcium channel blocker |
| Metoprolol | Lopressor, Toprol XL | Betaloc, Lopresor | Betaloc, Minax | Beta blocker |
| Warfarin | Coumadin, Jantoven | Marevan, Warfarin | Marevan, Warfarin | Anticoagulant |
| Clopidogrel | Plavix | Plavix | Plavix, Apo-Clopidogrel | Antiplatelet |
| Apixaban | Eliquis | Eliquis | Eliquis | DOAC (novel anticoagulant) |
| Losartan | Cozaar | Cozaar | Cozaar, Losartan Sandoz | ARB |
If you are traveling or relocating and need to find a medication in another country, follow these steps:
Medication regulations vary significantly between the US, EU, and Australia:
Medical Disclaimer: The information provided on this page is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult with a qualified healthcare provider or pharmacist before making any decisions about medications, supplements, or treatments. Never disregard professional medical advice because of something you read here.