Drug Interactions Directory
2,618 drugs with documented interactions.
2,618Drugs
67,117Interactions
53,805Serious (major+)
PharmacistReviewed
1Look up a drugSearch by generic or brand name, or browse A-Z.
2Scan the severityInteractions are grouped and color-coded by how much they matter.
3Read the write-upPlain-English and clinical explanations, with cited evidence.
Popular:
Buprenorphine
633
Hydroxychloroquine
631
Ketoconazole Topical
546
Cyclosporine Injection
545
Cyclosporine Ophthalmic
545
Sertraline
532
Amitriptyline
525
Fentanyl Transdermal Patch
493
Your recent:
Sources: FDA prescribing information (Structured Product Labeling), the published literature cited in each entry, DDInter 2.0 (a major open-access drug-interaction database), and legacy DrugBank interaction data distributed by the NIH's RxNav service (decommissioned in 2024) — analyzed and reviewed by our pharmacist team. How we build this library →
B
Brompheniramine
23
Buchu
8
Bucindolol
9
Buclizine
1
Budesonide
248
Budesonide Nasal Spray
221
Budesonide Oral Inhalation
221
Bufexamac
87
Buflomedil
3
Bugleweed
3
Bumetanide
55
Bunazosin
16
Bupivacaine
9
Bupivacaine Hydrochloride
1
Bupivacaine Liposome
8
Bupranolol
5
Buprenorphine
633
Bupropion
117
Burosumab-Twza
6
Burosumab-Twza Injection
8
Buserelin
18
Buspirone
40
Busulfan
18
Busulfan Injection
36
Butabarbital
30
Butalbital
30
Buthiazide
10
Buthionine Sulfoximine
2
Butorphanol
35
Butorphanol Injection
258
Butorphanol Nasal Spray
258
Butriptyline
1
Butylscopolamine
1
C
Cabazitaxel
1
Cabazitaxel Injection
39
Cabbage
1
Cabergoline
71
Cabotegravir
54
Cabozantinib
93
Cabozantinib (Thyroid Cancer)
90
Calaspargase Pegol-Mknl Injection
15
Calcifediol
63
Calcitonin
1
Calcitriol
15
Calcitriol Topical
14
Calcium
28
Calcium Acetate
3
Calcium Carbonate
23
Calcium Chloride
2
Calcium Citrate
2
Calcium Gluceptate
1
Calcium Gluconate
2
Calcium Oxybate
25
Calcium Silicate
15
Canagliflozin
128
Canakinumab Injection
17
Candesartan
51
Candesartan Cilexetil
4
Cangrelor
35
Cannabidiol
53
Cannabis
41
Canrenoate
20
Canrenone
11
Capecitabine
98
Capivasertib
17
Caplacizumab-Yhdp
17
Caplacizumab-Yhdp Injection
47
Capmatinib
136
Capreomycin
9
Capsaicin
87
Capsaicin Topical
79
Capsaicin Transdermal Patch
79
Captopril
231
Carbachol
20
Carbamazepine
256
Carbenicillin
11
Carbetocin
1
Carbidopa
24
Carbimazole
11
Carbinoxamine
31
Carboplatin
30
Carboplatin Injection
25
Carboprost
1
Carfilzomib Injection
15
Cariprazine
157
Carisoprodol
25
Carmustine
21
Carmustine Implant
20
Carob
1
Carphenazine
19
Carprofen
1
Carteolol
58
Carvedilol
82
Cascara Sagrada
1
Caspofungin
9
Caspofungin Injection
13
Castor Oil
3
Cat's Claw
16
Cedazuridine
6
Cefaclor
31
Cefadroxil
30
Cefamandole
2
Cefatrizine
1
Cefazolin
6
Cefazolin Injection
5
Cefdinir
42
Cefditoren
6
Cefditoren Pivoxil
3
Cefepime
6
Cefepime Injection
38
Cefetamet
1
Cefixime
27
Cefoperazone
2
Cefotaxime Injection
6
Cefotetan
1
Cefotetan Injection
4
Cefoxitin
1
Cefoxitin Injection
3
Cefpodoxime
26
Cefpodoxime Proxetil
3