Merck stated that there were no approved U.S. monovalent single-antigen vaccines for measles, mumps, or rubella as of 2025-10-06.
October 06, 2025
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regulatory
Manufacturer statement about available vaccine approvals in the United States.
The U.S. Food and Drug Administration states that gray-market GLP-1 drugs obtained outside the legal drug supply chain are not evaluated for safety, quality, or efficacy and may be counterfeit, contaminated, or improperly compounded.
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regulatory
Regulatory agencies advise that products outside approved distribution and manufacturing controls carry increased safety risks.
Gray-market medications are versions of prescription medicines obtained outside the usual prescription process, which bypass standard safety controls and increase medical risk for users.
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definition
Definition and risks associated with medications obtained outside regulated medical and pharmacy channels.
Unregulated or compounded versions of prescription peptides such as semaglutide can contain unverified chemical forms that differ from FDA‑approved formulations, creating safety and quality concerns.
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safety
Compounded or unregulated peptide products may not match approved chemical specifications and can pose risks.