What symptoms occur if Lithium levels are above 1.5 mEq/L?

When lithium levels exceed 1.5 mEq/L, the symptoms can include hand tremor, gastrointestinal upset, and slurred speech. Hand tremors are a common side effect of lithium toxicity because the drug affects neuromuscular function. Gastrointestinal upset can manifest as nausea, vomiting, or diarrhea, which is a typical response to lithium's irritative effects at higher concentrations. Slurred speech can occur due to the central nervous system's impairment from elevated lithium levels, affecting coordination and speech processing.

Understanding these symptoms is essential for monitoring patients on lithium therapy, as toxicity can lead to more severe complications if not addressed promptly.