Here's what rhymes with intrathecal.

Consider these alternatives

flumazenil / feel octreotide / side intraperitoneal / feel mitoxantrone / known physostigmine / strychnine hydroxyzine / seen ofloxacin / having budesonide / side metronidazole / holy lactulose / close etomidate / state transdermal / external selegiline / seen ganciclovir / will doxycycline / line sclerotherapy / therapy acetylcysteine / line buprenorphine / seen trazodone / known