Reaction

White Blood Cell Count Abnormal reporting signals

Last recalculated 2026-09-14T18:28:35.993900+00:00 · 6,288 reports · 189 co-occurring drugs

As of the last recalculation, White Blood Cell Count Abnormal appears in 6,288 FAERS reports alongside 189 co-occurring drug terms. The strongest observed disproportionality signal is ACALABRUTINIB (PRR 23.8).

Important: FAERS is a spontaneous, voluntary, unverified reporting system. PRR and ROR identify reporting patterns for investigation; they are not incidence rates and do not establish causation.

Drug	Co-reports	PRR	ROR
Acalabrutinib	86	23.8	24.0
Ibrutinib	469	20.7	20.8
Ruxolitinib	416	20.5	20.6
Palbociclib	441	16.4	16.5
Venetoclax	264	14.8	14.8
Alemtuzumab	74	12.8	12.8
Fulvestrant	117	11.9	12.0
Ribociclib	109	11.6	11.7
Filgrastim	129	11.6	11.6
Pegfilgrastim	306	10.7	10.8
Sulfasalazine	242	10.6	10.6
Amoxicillin	225	10.1	10.1
Letrozole Tablets	143	10.0	10.1
Hydroxyurea	63	10.0	10.0
Baclofen	242	9.6	9.7
Anastrozole Tablets	58	9.0	9.0
Letrozole	157	8.6	8.6
Fentanyl	243	8.5	8.5
Leflunomide	243	8.0	8.0
Nilotinib	70	7.9	8.0
Bupropion Hydrochloride	223	7.7	7.7
Niraparib	51	7.7	7.7
Diroximel Fumarate	26	7.2	7.3
Azacitidine	64	7.2	7.2
Tocilizumab	240	7.2	7.2
Fluoxetine Hydrochloride	267	7.2	7.2
Ifosfamide	44	6.8	6.8
Rucaparib	18	6.8	6.8
Avapritinib	24	6.6	6.6
Bupropion	84	6.3	6.3
Celecoxib	241	6.3	6.3
Azacitidine For	34	6.2	6.2
Telmisartan	33	6.1	6.2
Anastrozole	65	5.9	5.9
Bosutinib	16	5.9	5.9
Blinatumomab	18	5.7	5.7
Rituximab	348	5.7	5.7
Abatacept	228	5.6	5.6
Temozolomide	33	5.2	5.2
Duloxetine Hydrochloride	274	5.0	5.0
Fexofenadine	24	4.8	4.8
Morphine	106	4.8	4.8
Cytarabine	84	4.7	4.7
Obinutuzumab	22	4.4	4.4
Eculizumab	71	4.4	4.4
Olaparib	27	4.3	4.3
Doxorubicin Hydrochloride	42	4.3	4.3
Brentuximab Vedotin	13	4.2	4.2
Cisplatin	96	4.1	4.1
Dimethyl Fumarate	150	4.1	4.1
Pomalidomide	125	4.1	4.1
Magnesium Sulfate	16	4.1	4.1
Sennosides 8.6 Mg Tablets	25	4.0	4.0
Prochlorperazine Maleate	11	4.0	4.0
Thiamine Hydrochloride, Riboflavin 5 Phosphate Sodium, Dexpanthenol And Niacinamide	36	3.9	4.0
Senna	25	3.9	3.9
Morphine Sulfate	140	3.9	3.9
Bleomycin Sulfate	12	3.9	3.9
Selinexor	10	3.8	3.8
Sarilumab	30	3.8	3.8
Peginterferon Alfa-2A	61	3.8	3.8
Daspone	11	3.7	3.7
Dapsone Gel, 5%	11	3.7	3.7
Senna Leaf	26	3.7	3.7
Erythropoietin	23	3.7	3.7
Psyllium Husk	11	3.7	3.7
Pertuzumab	30	3.7	3.7
Cyclophosphamide Injection, Solution	191	3.7	3.7
Cyclophosphamide	191	3.7	3.7
Cyclophosphamide For Injection	191	3.7	3.7
Magnesium Sulfate In Water For	14	3.6	3.6
Magnesium Sulfate Heptahydrate	14	3.6	3.6
Mesna	9	3.5	3.5
Acyclovir	117	3.4	3.4
Standardized Senna Concentrate	13	3.4	3.4
Dapsone	11	3.4	3.4
Etoposide	75	3.4	3.4
Fingolimod Hcl	88	3.4	3.4
Allopurinol	155	3.3	3.3
Tolterodine Tartrate	9	3.3	3.3
Abemaciclib	20	3.3	3.3
Romiplostim	15	3.3	3.3
Sennosides	29	3.2	3.2
Dasatinib	36	3.2	3.2
Imatinib	17	3.2	3.2
Valacyclovir	40	3.2	3.2
Rosuvastatin Calcium	27	3.2	3.2
Fluorouracil Cream, 0.5%	72	3.1	3.2
Fluorouracil	73	3.1	3.2
Lenalidomide	382	3.1	3.1
Doxorubicin	83	3.1	3.1
Magnesium	75	3.0	3.0
Iron	61	3.0	3.0
Valacyclovir Hydrochloride	64	3.0	3.0
Oxybutynin Chloride	8	3.0	3.0
Bendamustine Hcl	14	3.0	3.0
Prednisone	429	3.0	3.0
Mirabegron	34	2.9	2.9
Ursosiol	17	2.9	2.9
Dronabinol	7	2.9	2.9
Atovaquone	7	2.9	2.9
Oxaliplatin	63	2.8	2.8
Fenofibrate	30	2.8	2.8
Mesna Injection	7	2.8	2.8
Butalbital, Acetaminophen, And Caffeine	9	2.8	2.8
Peginterferon Beta-1A	11	2.8	2.8
Trifluridine And Tipiracil	9	2.8	2.8
Biotin	26	2.8	2.8
Vitamin C	76	2.8	2.8
Cladribine	8	2.8	2.8
Zinc	20	2.7	2.7
Diphenhydramine Hcl	9	2.7	2.7
Zinc Chloride	20	2.7	2.7
Exemestane	17	2.6	2.6
Leucovorin Calcium	15	2.6	2.6
Siponimod	7	2.6	2.6
Ursodiol	17	2.6	2.6
Gemcitabine	30	2.5	2.5
Famotidine	88	2.5	2.5
Imatinib Mesylate	21	2.5	2.5
Calcium	109	2.5	2.5
Dutasteride	6	2.4	2.4
Dapagliflozin	23	2.4	2.4
Ixazomib	21	2.4	2.4
Dexamethasone 1.5 Mg	209	2.4	2.4
Ozanimod Hydrochloride	6	2.4	2.4
Sevoflurane	6	2.4	2.4
Dexamethasone	209	2.4	2.4
Carboplatin	90	2.4	2.4
Dexamethasone Sodium Phosphate	7	2.3	2.3
Vincristine Sulfate	20	2.3	2.3
Gemcitabine Hydrochloride	36	2.3	2.3
Goserelin	9	2.2	2.2
Dabrafenib	14	2.2	2.2
Voriconazole	20	2.2	2.2
Dalfampridine	47	2.2	2.2
Latanoprost	33	2.2	2.2
Prochlorperazine	18	2.2	2.2
Zoledronic Acid	26	2.1	2.1
Fesoterodine Fumarate	7	2.1	2.1
Voriconazole Injection	14	2.1	2.1
Thiotepa	6	2.1	2.1
Metoprolol Succinate Er Tablets	39	2.1	2.1
Ribavirin	40	2.1	2.1
Loratadine Tablet	33	2.0	2.0
Posaconazole	10	2.0	2.0
Docetaxel Anhydrous	40	2.0	2.0
Docetaxel	40	2.0	2.0
Naproxen Sodium, Dextromethorphan Hydrobromide, Guaifenesin	12	1.9	1.9
Naproxen Sodium, Pseudoephedrine Hydrochloride	12	1.9	1.9
Granisetron Hydrochloride	6	1.9	1.9
Loratadine	61	1.9	1.9
Carfilzomib	16	1.9	1.9
Deferasirox	15	1.9	1.9
Instalax Polyethylene Glycol 3350	7	1.9	1.9
Pembrolizumab	59	1.9	1.9
Apixaban	37	1.8	1.8
Irinotecan Hydrochloride	7	1.8	1.8
Trametinib	13	1.8	1.8
Fludarabine Phosphate	21	1.8	1.8
Upadacitinib	43	1.8	1.8
Pemetrexed Disodium	20	1.7	1.7
Eltrombopag Olamine	12	1.7	1.7
Bendamustine Hydrochloride	6	1.7	1.7
Paclitaxel (Aibumin-Bound)	37	1.5	1.5
Capecitabine	40	1.4	1.4
Interferon Beta-1A	84	1.4	1.4
Daptomycin	4	1.4	1.4
Paclitaxel	42	1.4	1.4
Teriflunomide	19	1.4	1.4
Pemetrexed	9	1.4	1.4
Cetuximab	13	1.4	1.4
Clozapine	52	1.4	1.4
Natalizumab	72	1.3	1.3
Cabozantinib	18	1.2	1.2
Vibegron	3	1.2	1.2
Ocrelizumab	23	1.2	1.2
Ofatumumab	12	1.2	1.2
Daratumumab	14	1.2	1.2
Voclosporin	3	1.1	1.1
Vismodegib	3	1.1	1.1
Denosumab	65	1.1	1.1
Etanercept	181	1.0	1.0
Benralizumab	6	1.0	1.0
Fam-Trastuzumab Deruxtecan-Nxki	3	1.0	1.0
Relugolix	7	1.0	1.0
Abaloparatide	6	0.7	0.7
Palivizumab	3	0.6	0.6
Voxelotor	3	0.4	0.4

Related reactions

Data source: openFDA FAERS. See the OpenPV methodology and limitations.