Sorry, but there is nothing yet known as a replacement for codeine syrup.

Perhaps your query is too complicated? For example there are alternatives to the following parts of your query:

codeine (32)
syrup (40)

Maybe some reasonable answers will be found next time you come.

Your alternative for codeine syrup is not listed? Suggest!
Speaking about codeine syrup, one probably shouldn't forget about promethazine.

Other search terms related to codeine syrup and their ratings are:

★★★★★ promethazine
★★★ acetaminophen
★★★ guaifenesin
You have in mind a companion for codeine syrup and it is not yet here? Propose!

Google Trends

Scale is based on the average worldwide traffic of codeine syrup in all years. Click on graph for more.
codeine syrup