| Half-life | 5 hours |
| Clearance Route | hepatic |
| Active Metabolites | yes |
| Notes | Half-life varies 3–6 h depending on inhaled vs oral. |
Severity: Mild
Adverse Effects:
Tremor, palpitations, hypokalemia, tachycardia
Contraindications:
Severe tachyarrhythmias
Precautions:
Use cautiously with MAOIs; monitor K⁺ in high doses