Scientific Make Up-Composition Of The March Birthstone. Aquamarines vary in color from deep blue to bluish-green, with differing intensities due to the varying quantities of iron in the beryl crystal. Naturally occurring deep blue aquamarine stones are rare, expensive and in high demand.
A Stacy Wiegman, PharmD , Pharmacy, answered. Zofran (ondansetron) acts fairly quickly. For people who are undergoing chemotherapy, it is usually given 30 minutes before starting the chemo so that it is working when chemo starts. To prevent nausea and vomiting after surgery, it is usually given one hour before the operation.
Ondansetron (marketed as Zofran) Information. Ondansetron is used to prevent nausea and vomiting caused by cancer chemotherapy, radiation therapy and surgery. It is in a class of medications called 5-HT3 receptor antagonists and works by blocking the action of serotonin, a natural substance that may cause nausea and vomiting.