I survived my trek: a kindly Pakastani-Indian taxi driver picked me up at Broadway and Amsterdam, drove me to my doctor on West 71st, waited while I went in to pick up the prescription, and then took me to the pharmacy on Amsterdam. I left there with the prescription, walked down to Citibank, made a deposit, and took the bus home. I do not believe I'll be wandering around any more today.
I hear footsteps above me; I guess they are showing the apartment to possible tenants. I hope the next tenant is a better one than the last two!