Recently, I ve been getting weak erections when with my partner or when masturbating. It doesn t get hard enough to stand on its own, and will go down almost instantly. I used to get rock hard just thinking about sex, now I can feel it tingling but nothing more... but i used a herbal drug, without asking a doctor , this drug made in china ,its name is (Bolong) which helps and make me better but am afraid if it has any sideeffect? i am 23 years old.