Law Of Salah :
When Does Vomiting Nullify One Wuzu ?
Vomiting food or water that is a mouthful invalidates Wuzu. It is considered a mouthful when it cannot be prevented easily. This vomit is as impure as urine, so it is vital to protect the clothes and body from being stained by it. ( dur-e-mukhtaar ma' rad-dul-muhtaar, V1 P289 )