Some side effects with Toprol-XL, while occurring infrequently, are potentially serious and should be reported immediately to your healthcare provider. These include but are not limited to:
Signs of an allergic reaction, including unexplained rash, hives, itching, unexplained swelling, wheezing, or difficulty breathing or swallowing.
Rare Toprol-XL Side Effects
Rare side effects occur in less than 1 percent of people taking Toprol-XL. Given how uncommon they are, however, it can be difficult to tell whether these possible side effects are actually caused by the medication, other factors, or a combination of these.
Some of these rare but possible side effects of Toprol-XL include but are not limited to: