Where can I get a drug called mizollen?

I have been suffering from urticaria. Back in my own country I was prescribed a drug called mizollen and its active ingredient is called mizolastine. The drug was really effective.

I have looked for the drug in Quito for a few days and it seems they don’t have the drug.

Does anyone know where I can find the drug in Ecuador? Or do I need to go to the hospital to get it?

Thanks in advance!

Jason