Drug

Cefaclor

113 flagged reaction(s) · 2,496 total co-reports · max PRR 53.2

Important: Reactions below are the flagged terms from this drug’s FAERS report history (min. 3 co-reports per term) — PRR/ROR indicate disproportionality in spontaneous reporting, not causation. Data from FDA FAERS via openFDA. Last recalculated: 2026-09-14.

	Reaction	Co-reports (a)	PRR	ROR	Signal
1	Red Blood Cell Sedimentation Rate Increased	43	53.2	54.7	signal
2	Platelet Count Increased	50	52.5	54.2	signal
3	Secretion Discharge	41	45.5	46.7	signal
4	Toxic Epidermal Necrolysis	40	36.3	37.3	signal
5	Eye Inflammation	22	31.9	32.4	signal
6	Clostridium Difficile Infection	41	25.9	26.6	signal
7	Lymphocyte Count Decreased	31	24.0	24.5	signal
8	Paralysis	24	22.9	23.2	signal
9	Skin Infection	18	22.1	22.3	signal
10	Paraesthesia Oral	23	21.9	22.2	signal
11	Helicobacter Infection	16	21.5	21.7	signal
12	Staphylococcal Infection	50	20.7	21.3	signal
13	Drug Eruption	26	20.2	20.5	signal
14	Muscle Tightness	23	19.5	19.7	signal
15	Therapeutic Product Effect Incomplete	95	18.4	19.5	signal
16	Obesity	21	18.0	18.2	signal
17	Drug Hypersensitivity	252	17.8	21.1	signal
18	Pemphigus	16	17.6	17.8	signal
19	Erythema Multiforme	11	16.1	16.3	signal
20	Liver Injury	28	15.8	16.1	signal
21	Iron Deficiency Anaemia	10	14.9	15.0	signal
22	End Stage Renal Disease	20	14.9	15.0	signal
23	Hypocalcaemia	20	14.5	14.7	signal
24	Renal Tubular Necrosis	10	13.9	14.0	signal
25	Neutrophil Count Decreased	41	13.8	14.2	signal
26	Drug Intolerance	96	13.6	14.5	signal
27	Gastroenteritis	14	13.1	13.3	signal
28	Rash Erythematous	45	13.1	13.5	signal
29	Mouth Ulceration	20	13.0	13.2	signal
30	Pericarditis	15	12.3	12.4	signal
31	Angioedema	39	12.1	12.4	signal
32	Stevens-johnson Syndrome	19	11.7	11.8	signal
33	Disseminated Intravascular Coagulation	12	11.6	11.7	signal
34	Chronic Kidney Disease	64	11.4	11.9	signal
35	Hyperlipidaemia	10	11.4	11.5	signal
36	Irritable Bowel Syndrome	17	10.9	11.0	signal
37	Hypokalaemia	36	10.7	11.0	signal
38	Type 2 Diabetes Mellitus	26	10.5	10.7	signal
39	Viral Infection	25	10.3	10.4	signal
40	Septic Shock	32	10.1	10.3	signal
41	Infection	106	10.1	10.7	signal
42	Alanine Aminotransferase Increased	45	10.0	10.3	signal
43	Knee Operation	7	9.9	9.9	signal
44	Candida Infection	12	9.8	9.9	signal
45	Aspartate Aminotransferase Increased	38	9.8	10.0	signal
46	Carpal Tunnel Syndrome	10	9.7	9.8	signal
47	Systemic Lupus Erythematosus	25	9.7	9.8	signal
48	Anaphylactic Shock	18	9.6	9.7	signal
49	Cystitis	22	9.4	9.5	signal
50	Shock	15	9.0	9.1	signal
51	Osteopenia	10	9.0	9.0	signal
52	Agranulocytosis	12	8.9	8.9	signal
53	Dry Eye	31	8.8	8.9	signal
54	Gamma-glutamyltransferase Increased	14	8.6	8.7	signal
55	Speech Disorder	33	8.6	8.8	signal
56	Skin Lesion	17	8.5	8.6	signal
57	Rotator Cuff Syndrome	8	8.5	8.5	signal
58	Bacterial Infection	11	8.1	8.2	signal
59	Economic Problem	9	8.0	8.0	signal
60	Hyperkalaemia	20	7.8	7.9	signal
61	Anaphylactic Reaction	31	7.7	7.9	signal
62	Rash Maculo-papular	12	7.4	7.5	signal
63	Hepatotoxicity	12	7.4	7.5	signal
64	Wound	15	7.4	7.4	signal
65	Nerve Injury	6	7.4	7.4	signal
66	Hepatic Failure	16	7.2	7.3	signal
67	Device Related Infection	8	7.1	7.1	signal
68	White Blood Cell Count Decreased	56	7.1	7.3	signal
69	Hepatic Function Abnormal	19	7.0	7.1	signal
70	Lower Respiratory Tract Infection	23	6.9	7.0	signal
71	Myelosuppression	17	6.8	6.9	signal
72	Hypotonia	5	6.8	6.8	signal
73	Dysphonia	29	6.8	6.9	signal
74	Rash Macular	17	6.7	6.7	signal
75	Neutrophil Count Increased	5	6.7	6.7	signal
76	Rash Pruritic	26	6.6	6.7	signal
77	Dermatitis Allergic	6	6.6	6.6	signal
78	Impaired Gastric Emptying	6	6.4	6.5	signal
79	Blood Triglycerides Increased	8	6.2	6.2	signal
80	Joint Range Of Motion Decreased	6	6.1	6.2	signal
81	Restless Legs Syndrome	8	6.0	6.0	signal
82	Blood Lactate Dehydrogenase Increased	7	6.0	6.0	signal
83	Vasculitis	5	5.9	5.9	signal
84	Tubulointerstitial Nephritis	8	5.8	5.9	signal
85	Urticaria	71	5.8	6.1	signal
86	Lymphopenia	6	5.8	5.9	signal
87	Abortion Induced	4	5.8	5.8	signal
88	Polyneuropathy	5	5.7	5.8	signal
89	Gallbladder Disorder	7	5.3	5.4	signal
90	Toothache	7	5.3	5.3	signal
91	Tendonitis	6	5.3	5.3	signal
92	Rhabdomyolysis	16	5.3	5.3	signal
93	Anorexia	5	5.2	5.2	signal
94	Transfusion	4	5.2	5.2	signal
95	Diabetic Ketoacidosis	9	5.1	5.2	signal
96	Extrapyramidal Disorder	9	4.9	4.9	signal
97	Skin Reaction	5	4.9	4.9	signal
98	Eyelid Oedema	4	4.7	4.7	signal
99	Neuroleptic Malignant Syndrome	4	4.6	4.6	signal
100	Cytomegalovirus Infection	5	4.1	4.1	signal
101	Eosinophilia	5	3.9	3.9	signal
102	Synovitis	5	3.8	3.8	signal
103	Premature Delivery	4	3.4	3.4	signal
104	Hepatocellular Injury	3	2.9	2.9	no signal
105	Tardive Dyskinesia	6	2.9	2.9	signal
106	Drug Reaction With Eosinophilia And Systemic Symptoms	5	2.7	2.7	no signal
107	Multiple Fractures	3	2.5	2.5	no signal
108	Premature Baby	5	2.3	2.3	no signal
109	Suicide Attempt	10	2.2	2.3	signal
110	Foetal Exposure During Pregnancy	13	2.2	2.2	signal
111	Menorrhagia	3	2.1	2.1	no signal
112	Drug Exposure During Pregnancy	4	1.6	1.6	no signal
113	Intentional Overdose	7	1.5	1.5	no signal