Coca, Muna and chachacoma tea

I tried to chew the coca leaves. The taste was not as bitter as I thought. It was recommended to chew for a few minutes and hold them in one side of the mouth for 20 minutes before spit them out. Because the leaves are stimulant and too much chewing during the day may help to adjust the high altitude but if continued to late evening, it may affect your sleep so the guide suggested that the last chewing should be around 2 or 3:00 pm.