Nope. Just be at the hospital early because you have to fast. They'll make you drink something like this (see photo) then they'll take your blood every hour for the next 3 hours.
Hindi naman ganun ka hirap may fasting po kase yan eh bawal Kumain or uminom while on fasting. Tas mas Oras pa kada kuha ng dugo kaya medyo tatamlayin ka.
Pham Guiao