Buy Hydrocodone Online. It is a strong painkiller used for moderate to severe pain. It is often mixed with other medicines like acetaminophen (Tylenol). A common name is Vicodin.It blocks pain signals in the brain and can make you feel relaxed or sleepy. Hydrocodone can be very addictive. Taking too much can slow down your breathing, which can be life-threatening. It can also hurt your liver if taken with too much acetaminophen.