Drug

Chloroquine Phosphate

41 flagged reaction(s) · 500 total co-reports · max PRR 56.9

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	Tachypnoea	24	56.9	59.0	signal
2	Brain Oedema	21	53.4	55.1	signal
3	Covid-19 Pneumonia	19	51.3	52.8	signal
4	Red Blood Cell Sedimentation Rate Increased	15	43.4	44.4	signal
5	Ventricular Fibrillation	14	40.3	41.2	signal
6	Cardiomyopathy	18	39.0	40.1	signal
7	Acute Respiratory Failure	19	31.8	32.8	signal
8	Hypoxia	32	29.3	30.7	signal
9	Encephalopathy	21	27.5	28.4	signal
10	Pulmonary Fibrosis	16	26.9	27.5	signal
11	Hypercalcaemia	10	26.0	26.4	signal
12	Synovitis	14	24.9	25.4	signal
13	Hepatomegaly	7	22.7	23.0	signal
14	Mania	11	21.5	21.8	signal
15	Basal Cell Carcinoma	10	20.5	20.8	signal
16	Ulcer	10	20.1	20.4	signal
17	Drug Eruption	11	20.0	20.3	signal
18	Ventricular Tachycardia	10	19.4	19.6	signal
19	Cardiogenic Shock	8	18.0	18.2	signal
20	Tuberculosis	7	17.5	17.6	signal
21	Pulmonary Oedema	23	16.5	17.0	signal
22	Prescribed Underdose	10	16.1	16.3	signal
23	Intentional Overdose	31	15.6	16.3	signal
24	Immunodeficiency	7	15.2	15.4	signal
25	Hepatitis	12	15.0	15.3	signal
26	Drug Toxicity	6	13.9	14.1	signal
27	Nephropathy	4	13.7	13.7	signal
28	Systemic Lupus Erythematosus	15	13.6	13.9	signal
29	Hypotonia	4	12.8	12.9	signal
30	Deafness	10	12.2	12.4	signal
31	Contraindicated Product Administered	11	11.7	11.9	signal
32	Multi-organ Failure	6	11.0	11.1	signal
33	Polyneuropathy	4	10.8	10.8	signal
34	Anorexia	4	9.8	9.9	signal
35	Visual Acuity Reduced	10	9.6	9.7	signal
36	Metastases To Lung	3	8.3	8.4	signal
37	Completed Suicide	20	7.6	7.8	signal
38	Metastases To Central Nervous System	3	7.5	7.5	signal
39	Suicide Attempt	14	7.4	7.5	signal
40	Hand Deformity	3	7.4	7.4	signal
41	Drug Exposure During Pregnancy	3	2.8	2.8	no signal