M-M-R II: side effects, ingredients & package insert

M-M-R II ingredients (FDA package insert, Section 11)

Per-dose composition as stated in the prescribing information; verified 2026-07-09. Click an ingredient for every vaccine that contains it.

Note: Live attenuated; no adjuvant. Product contains no preservative.

Source: DailyMed. Formulations change — re-verify before clinical use.

M-M-R II side effects: where the data is

Reported reactions for M-M-R II and the other MMR products are compiled on the MMR vaccine page: pre-licensure trial reactogenicity, VAERS report counts, and international databases (Canada Vigilance, EudraVigilance, Lareb, VigiAccess). Those counts are spontaneous reports with no denominator — a report does not establish that the vaccine caused the event.

• Pre-licensure clinical trial data
• Post-licensure surveillance (VAERS and international)
• Documented adverse events and causality assessment
• Vaccine Injury Table (VICP) — compensable injuries

M-M-R II lot number lookup

M-M-R II vs PRIORIX

All licensed MMR vaccine products side by side. Differences in platform, adjuvant and route are the usual reasons one is chosen over another; efficacy and safety comparisons belong to the trial and surveillance sections of the MMR vaccine page.

Schedule and age range

Licensed ages and the recommended series for MMR vaccines are on the MMR vaccine page; how 31 countries schedule it is on MMR schedule by country. Always confirm the product-specific age range in the current package insert.

Common questions about M-M-R II

What are the side effects of M-M-R II?

Common reactions listed in the M-M-R II package insert are injection-site pain, redness or swelling and short-lived systemic symptoms such as fever, tiredness or irritability. Rarer events and the reported counts from VAERS and international databases are on the MMR vaccine page; counts are reports, not rates, and do not prove the vaccine caused the event.

What is in M-M-R II?

M-M-R II contains Measles virus (live, attenuated); Mumps virus (live, attenuated); Rubella virus (live, attenuated) as antigen; adjuvant: none; it is preservative-free. Excipients: Sorbitol, Sucrose, Hydrolyzed gelatin, Recombinant human albumin, Fetal bovine serum, Neomycin, Other buffer and media ingredients. Amounts per dose are in the table above, taken from Section 11 of the FDA package insert (verified 2026-07-09).

Where is the M-M-R II package insert?

The FDA-licensed prescribing information for M-M-R II is published by Merck Sharp & Dohme LLC and the FDA; the source used for this page is https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=0a9e384f-e717-436b-b9a0-15e53cef0862. Formulations change, so re-verify the current insert before clinical use.

How does M-M-R II compare with PRIORIX?

M-M-R II (Merck Sharp & Dohme LLC) uses a live attenuated platform with adjuvant none, given intramuscular_or_subcutaneous; PRIORIX (GlaxoSmithKline Biologicals) uses live attenuated with adjuvant none. Both are licensed MMR vaccines; the comparison table above lists every product.