Substances that Extinguish Wind and Stop Tremors

What special cooking instruction should be followed when using Gou Teng (uncariae ramulus cum uncis) in decoction?

Overcooking Gou Teng may lessen its therapeutic effect.

Source: Bensky, D. (2004). Chinese Herbal Medicine: Materia Medica. Seattle, WA: Eastland Press. pp. 970 [Q1187]