IV fluids and electrolytes can help with some hangover symptoms like feeling dehydrated, tired, and dizzy. But they won't fix a hangover completely. Hangovers are caused by drinking too much alcohol, which can make you dehydrated and mess with the balance of chemicals in your body. To address the nausea, headache, and vomiting certain medications can be added by a medical professional like Toradol, Pepcid, and Zofran.