Propofol = pain on injection, hypotension. Ketamine = dissociative, bronchodilator, sympathetic stim.

Halothane = hepatotoxicity. Sevoflurane = sweet smelling, good for kids. MAC = inversely proportional to lipid solubility.

Spinal = Subarachnoid space (L3-L4). PDPH complication. Epidural = Epidural space, continuous.