Pharma24 - http://www.europcare.com/intlshop/ - carries it in liquid form as Paracodina fluid & Tosidrin. A teaspoon (tsp)is about 5 mL, so a tsp of Paracodina is 12.5 mg and a tsp of Tosidrin is 50 mg.

I'm pretty sure about a tsp = 5mL but you should check it out to be sure.

jbnugget