How about never?: You are not 'supposed' to vomit. Not all chemo drugs will cause vomiting and there are many agents used nowadays to prevent that side effect. Sadly, some people will still have nausea and even vomit but you should not assume that is the rule. Word of advise: if you are 'sure' you will vomit with chemo, there is very little your doc can do to prevent it. Very powerful the mind is....
Answered 8/19/2013
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