DrugDigest: Metoprolol ( Lopressor ): Information on dosage, usage, side effects, interactions, and drug comparisons, including generics when available.
Metoprolol Succinate: Information from the RxList.
Metoprolol Tartrate: Information from the RxList.
Toprol: Metoprolol succinate. Prescribing information for US residents.
Toprol-XL: Features product and heart disease information for US residents and healthcare professionals