MediHelp
Drug interactions A–Z
Known drug-drug interactions with severity, mechanism and clinical management.
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
- calcium (oral) + iron (oral) moderate
- calcium + ceftriaxone contraindicated
- calcium + ciprofloxacin moderate
- Calcium Carbonate + Cholecalciferol moderate
- calcium carbonate + omeprazole moderate
- calcium salts (with magnesium) + oral iron (ferrous salts) moderate
- Candesartan + Nitroglycerin moderate
- Captopril + Glimepiride moderate
- captopril + ibuprofen moderate
- carbamazepine + clarithromycin major
- carbamazepine + clozapine major
- carbamazepine + erythromycin major
- carbamazepine + ethinyl estradiol/levonorgestrel major
- carbamazepine + lithium major
- carbamazepine + lomitapide major
- carbamazepine + metronidazole moderate
- carbamazepine + oral contraceptives major
- carbamazepine + phenytoin moderate
- carbamazepine + tramadol major
- carbamazepine + voriconazole major
- carbapenem + valproate major
- Carbimazole + Rosuvastatin moderate
- Carvedilol + Perindopril moderate
- ceftixone + warfarin moderate
- ceftriaxone + lactated ringer's contraindicated
- ceftriaxone + lactated Ringer's solution major
- ceftriaxone + Ringer's solution contraindicated
- ceftriaxone + warfarin moderate
- Celecoxib + Diclofenac major
- Celecoxib + Naproxen major
- Celecoxib + Rivaroxaban major
- Celecoxib + Sulindac major
- Cetirizine + Clomipramine moderate
- Cetirizine + Theophylline minor
- Cetirizine + Trimeprazine moderate
- chloramphenicol + warfarin major
- chromium picolinate + metformin moderate
- Cimetidine + Dextromethorphan moderate
- cimetidine + dofetilide contraindicated
- Cimetidine + Trimethoprim/Sulfamethoxazole moderate
- ciprofloxacin + clozapine major
- Ciprofloxacin + Digoxin moderate
- ciprofloxacin + epimag major
- Ciprofloxacin + Ferrous Fumarate and Folic Acid moderate
- ciprofloxacin + levothyroxine moderate
- Ciprofloxacin + Naproxen moderate
- ciprofloxacin + phenytoin moderate
- ciprofloxacin + sulfamethoxazole/trimethoprim moderate
- ciprofloxacin + theophylline major
- ciprofloxacin + tizanidine contraindicated
- Ciprofloxacin + Torsemide moderate
- ciprofloxacin + warfarin major
- cisplatin + omeprazole moderate
- Citalopram + Fluconazole major
- citalopram + linezolid major
- citalopram + pimozide contraindicated
- clarithromycin + colchicine contraindicated
- clarithromycin + cyclosporine major
- clarithromycin + digoxin major
- clarithromycin + ergotamine contraindicated
- clarithromycin + fentanyl major
- clarithromycin + ivabradine contraindicated
- clarithromycin + ivacaftor major
- clarithromycin + methadone major
- Clarithromycin + Omeprazole moderate
- clarithromycin + pimozide contraindicated
- clarithromycin + rosuvastatin moderate
- clarithromycin + simvastatin contraindicated
- Clarithromycin + Theophylline moderate
- Clarithromycin + Tinidazole moderate
- clarithromycin + warfarin major
- Clomipramine + Pantoprazole moderate
- Clonazepam + Diazepam major
- Clonazepam + Gabapentin major
- clopidogrel + esomeprazole major
- clopidogrel + ginkgo biloba moderate
- clopidogrel + heparin major
- clopidogrel + omega-3 fatty acids moderate
- Clopidogrel + Omega-3-acid ethyl esters moderate
- clopidogrel + omeprazole major
- clopidogrel + pantoprazole moderate
- clopidogrel + prednisone moderate
- clopidogrel + rosuvastatin moderate
- clopidogrel + warfarin major
- clozapine + fluvoxamine major
- clozapine + ritonavir major
- clozapine + smoking (nicotine replacement) major
- clozapine + smoking cessation (bupropion/varenicline) major
- clozapine + smoking cessation (fluvoxamine) major
- clozapine + valproate major
- cobicistat + triazolam contraindicated
- colchicine + ritonavir contraindicated
- colchicine + verapamil major
- conivaptan + ketoconazole contraindicated
- cyclosporine + ramipril moderate
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