Risks associated with IV re-hydration are low for most adults. There is a risk of infection occurring at the site of the needle. In most cases, such infections can be treated easily. Another possible risk is creating an imbalance of nutrients in your body if the fluid solution contains the wrong mix of electrolytes. Caregivers should be monitoring to determine if an imbalance or deficiency occurs.
The needle at the insertion site may become dislodged which can cause infiltration. This means that the fluid goes into the tissues around the vein. This may cause a burning or stinging sensation at the site and a bruise. The needle can be removed and reinserted into a different vein. A warm compress can be used to reduce swelling. Keeping still during re-hydration can prevent dislodging.
Other rare adverse effects from IV therapy include but are not limited to: Allergic reactions to a nutrient, needle, or other supplies used, fever, nausea, upset stomach, and malaise due to changes in blood pressure, and any unforeseen adverse effects.