Betel nut, also known as Bettlenut, Paaku, Pinang, Areca nut
[20 Areca Catechu (Whole Betel Nuts), www.seedscollector.com/20-areca-catechu-whole-betel-nu20.html.]
Warning: Chewed betel nut produces a stimulant response that, in low doses, is similar to caffeine or nicotine. In high doses, betel nut produces cocaine-like effects including elevated heart rate, high blood pressure, dilated pupils, anxiety, insomnia, and cardiac arrhythmia.
[Russo, Juniper. “The Effects of Chewing Betel Nut.” LIVESTRONG.COM, Leaf Group, 3 Oct. 2017, www.livestrong.com/article/129158-effects-betel-nut-chewing/.]