Metoprolol Safety Profile

Safety Summary

Hazard Profilehazardous

Risk (Adults)Low

Risk (Children)Low

Risk (Dogs)Moderate

SummaryNo major regulatory flags

Molecular FormulaC15H25NO3

Molecular Weight267.36

These citations are the ones recorded for the human adult context.

FDA Prescribing Information: Metoprolol (Lopressor/Toprol-XL) — beta-1 selective; HFrEF MERIT-HF; abrupt discontinuation rebound; bradycardia contraindication; hypoglycemia masking; CYP2D6; glucagon antidote; succinate vs tartrate formulations (2023) REGULATORY · 2023
ASPCA Animal Poison Control Center: Cardiac Drug Toxicosis in Pets — statin myopathy in cats; beta-blocker bradycardia dogs; CCB toxicity (amlodipine/diltiazem); ACE inhibitor renal effects; warfarin anticoagulant; furosemide; toxic dose thresholds (2023) VETERINARY · 2023
where to look PubChem: Toxicity section (CID 4171) PUBCHEM
OEHHA Proposition 65 List of Carcinogens or Reproductive Toxicants (CSV, list date 31-Jul-26) REGULATORY
Permissible Exposure Limits – OSHA Annotated Table Z-1 REGULATORY
where to look DrugBank, as recorded by PubChem (Experimental Properties, CID 4171; where-to-look, not a source of this value) DATABASE · 2026
EPA CompTox CTX API: predicted properties for DTXSID2023309 (Metoprolol) REFERENCE

Same data as the API response, which is open and needs no key. The full per-record source list is available to authenticated callers.