What are potential side effects of local anesthetics?

Local anesthetics can lead to neurotoxicity and allergies as notable side effects. When local anesthetics are used, they work by blocking nerve conduction, which can sometimes lead to toxic effects on neural tissues. This neurotoxicity may manifest as symptoms such as paresthesia, seizures, or even central nervous system depression if systemic absorption occurs.

Allergic reactions to local anesthetics, although relatively rare, can present as skin reactions, anaphylaxis, or other hypersensitivity responses. These reactions are usually due to the ester-based local anesthetics and can lead to complications that necessitate prompt medical attention.

Other side effects mentioned in the options typically do not align directly with the spectrum of reactions expected from local anesthetics. While cardiovascular issues can arise, the more common association is actually with neurotoxicity and allergic responses as primary concerns. This combination of possible neurotoxic effects and allergic responses accurately reflects the side effect profile for local anesthetics.