Sometimes, kidney infections are accompanied by some nausea. In addition, nausea can be a side effect of the antibiotics prescribed to treat a kidney infection. Staying hydrated is helpful in fighting the nausea and is vital to replace the fluids lost through vomiting. Patients can use other home remedies such as nibbling on saltine crackers, sticking to an extremely bland diet and taking over-the-counter anti-nausea medication. If nausea continues, a doctor may prescribe further anti-nausea meds, and if vomiting doesn't cease, a patient may be admitted to the hospital to receive fluids intravenously.