Does Iced Parsley Tea work anywhere near as well as hot parsley tea?

I use parsley tea to speed up my period and try to keep it regulated, heating some up when I realize I'm missing my period. I've only drinken it hot. It's summer... and in California. I'm not really in the best setting to be downing hot tea. I'm sure I could brew it and then cool it off, but is there another method, with/without parsley that will speed up the process?