If. If you are stating that everytime you drink alcohol you vomit, then it is recommended that you not drink alcohol. If that is not what you mean, then please clarify.
Someone slipped something into my drink causing me to puke foam I have reason to believe it was C4 extreme, can it do that to someone with bad acid?
Doctored drinks. First, anything and everything is possible when their drinks get "laced". Second, reportedly "safe" food supplements often come with "additives" intended to "hook" the user by the "extras"--in the case of C4 it's dmaa, a very dangerous drug for unsuspecting victims--and a cause of death. Women (and men!) exposed to such criminal behavior should find somewhere else to pass their "leisure" time.