Common * Neurologic: headache (2%), dizziness (11%) * Gastrointestinal: nausea (6%), dyspepsia (3%) * Cholinergic: nasal congestion (3%), ejaculation failure (2%) * Respiratory: dyspnea (2%) * Other: fatigue (5%), vertigo (2%), orthostatic hypotension Low blood pressure with standing is more severe and more common with IV formulation (58% vs 1%) and is often the reason larger doses of the oral formulation cannot be used. Rare * Fever * Muscle cramps * Dry eyes * Heart block * Hyperkalemia * Hepatotoxicity * Drug eruption similar to lichen planus * Hypersensitivity - which may result in a lethal respiratory distress
Labetalol
Esmolol
Nadolol
Sodium nitroprusside
Nefopam
Alvimopan
Fenoldopam
Dobutamine