VARICELLA-ZOSTER VIRUS STRAIN OKA/MERCK LIVE ANTIGEN: 2,002 Adverse Event Reports & Safety Profile

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2,002

Total FAERS Reports

79 (3.9%)

Deaths Reported

265

Hospitalizations

2,002

As Primary/Secondary Suspect

Life-Threatening

Disabilities

Merck Sharp & Dohme LLC

Manufacturer

Drug Class: Actively Acquired Immunity [PE] · Manufacturer: Merck Sharp & Dohme LLC ·

First Report: 1990 · Latest Report: 20250925

What Are the Most Common VARICELLA-ZOSTER VIRUS STRAIN OKA/MERCK LIVE ANTIGEN Side Effects?

#1 Most Reported

No adverse event

772 reports (38.6%)

#2 Most Reported

Product storage error

330 reports (16.5%)

#3 Most Reported

Drug ineffective

245 reports (12.2%)

Side Effect	Reports	% of Total	Deaths	Hosp.
No adverse event	772	38.6%	0	0
Product storage error	330	16.5%	1	0
Drug ineffective	245	12.2%	4	45
Herpes zoster	209	10.4%	9	39
Diarrhoea	135	6.7%	2	37
Nausea	133	6.6%	0	27
Drug intolerance	125	6.2%	0	17
Expired product administered	125	6.2%	0	2
Pruritus	119	5.9%	0	22
Pyrexia	119	5.9%	11	37
Hypersensitivity	109	5.4%	0	23
Pain	105	5.2%	16	37
Vaccination failure	102	5.1%	10	26
Lymphoma	101	5.0%	0	1
Off label use	99	5.0%	2	39
Alopecia	97	4.9%	0	3
Neoplasm malignant	97	4.9%	0	1
Rash	97	4.9%	3	41
Tooth loss	96	4.8%	0	2
Onychoclasis	94	4.7%	0	1

Gender: 54.9% female, 45.1% male. Average age: 39.7 years. Most reports from: US. View detailed demographics →

Year	Reports	Deaths	Hosp.
2000	1	0	0
2002	1	0	0
2004	1	0	0
2005	3	0	1
2006	2	0	0
2007	2	0	0
2008	1	0	1
2009	8	2	2
2010	5	3	3
2011	7	1	3
2012	13	0	4
2013	22	1	11
2014	44	3	13
2015	74	4	14
2016	86	12	15
2017	381	16	24
2018	129	2	20
2019	161	1	6
2020	45	1	3
2021	44	0	16
2022	53	2	2
2023	48	0	11
2024	44	2	6
2025	123	0	10

Indication	Reports
Prophylaxis	1,444
Product used for unknown indication	270
Immunisation	123
Routine health maintenance	49
Rheumatoid arthritis	38
Varicella immunisation	34
Herpes zoster	26
Herpes zoster immunisation	5

Official prescribing information from the FDA-approved drug label.