Should be looked at cost per dosage - I promise it would be the cheapest looking at it that way.
Emetrol, 1-2 tablespoons for adults - that means 4oz bottle only has 6-12 doses at a cost of $12. That is like $1 or more per dose.
Emesyl might have what, 20 squirts to make a tsp? .5 oz is 3 tsp = 60 doses @ $.42/dose -- I didn't totally scientifically figure that out, just used some guesstimates. Maybe 30 squirts/tsp.