The Fish Poison Con by William S Burroughs

"So I walk in on this Pleasantville croaker and tell him I have contracted this Venusian virus and subject to dissolve myself in poison juices and assimilate the passers-by unless I get my medicine and get it regular – So I walk in on this old party smelling like a compost heap and steaming demurely and he snaps at me, "What’s your trouble?”

"The Venusian Gook Rot, doctor."

"Now see here young man my time is valuable."

"Doctor, this is a medical emergency."

Old shit but good – I walked out on the nod –

 Audio cribbed from Ubuweb.  Text clipped from the Google Books preview of Nova Express