IV Fluids at Home: When They May Be Used and When They Can Be Dangerous

What IV Fluids Are

Intravenous (IV) fluids are sterile solutions given directly into a vein through a small plastic tube called a cannula. Different fluids contain different amounts of water, salts (such as sodium and potassium) and sugar. Doctors choose the type, amount and rate of fluid based on the patient's condition, blood test results and how their body is handling fluid.

Because IV fluids bypass the body's normal control of what is absorbed from the gut, they can change the balance of water and salts in the body quickly. This is why they are treated as a medicine that needs a prescription, careful monitoring and, often, blood tests.

When IV Fluids May Be Used at Home

In carefully selected situations, a doctor may decide that fluids can be safely given at home. Examples include:

• Mild to moderate dehydration in a stable patient who cannot drink enough, where the cause is understood and the patient does not need hospital-level care
• Continuing a course of IV treatment, such as certain antibiotics, that was started and planned by a medical team
• Some patients receiving palliative or end-of-life care, where the aim is comfort and the plan has been discussed with the family

In each case, the decision should follow a medical assessment, and there should be a clear plan for how the patient will be monitored and what to do if they do not improve.

Why a "Drip" Is Not a General Remedy

Many people believe that a "saline" or "drip" will quickly restore strength after illness or tiredness. For most people who can drink adequately, fluids taken by mouth — including oral rehydration solution when appropriate — are usually preferred and avoid the risks associated with an IV cannula and unnecessary intravenous fluid. IV fluids given without a clear medical reason expose the patient to the risks of a cannula and of fluid or salt imbalance without any real benefit.

There is also no good evidence that "vitamin drips" or similar infusions improve general health or energy in people who are otherwise well.

When IV Fluids at Home Can Be Dangerous

Heart and kidney conditions

In people with heart failure, kidney disease or some liver conditions, the body may not be able to handle extra fluid. Too much fluid can build up in the lungs and cause breathlessness, or cause swelling in the legs and abdomen.

Salt and sugar imbalance

Giving the wrong type of fluid, or too much, can cause dangerous changes in sodium, potassium or blood sugar. Older people and those taking certain medicines are especially vulnerable. Blood tests are often needed to guide fluid treatment safely.

Dengue

Fluid management in dengue requires careful, frequent monitoring, often with repeated blood tests, because the right amount of fluid changes during the illness and both too little and too much can be harmful. Patients with dengue who have warning signs, or who are in the critical phase, need hospital care rather than IV fluids at home. More information is available on our English Health Education guide to fluids in dengue.

Masking a serious illness

A patient who is weak, dehydrated or unable to drink may have a serious underlying problem, such as a severe infection, bowel obstruction, kidney injury or diabetes emergency. Giving fluids at home may make them feel temporarily better while the real cause goes untreated.

Cannula problems

A cannula can cause inflammation of the vein, infection, fluid leaking into the surrounding tissue, or bleeding if it is dislodged. It needs to be inserted and checked by trained staff and removed when no longer needed.

If IV Fluids Are Given at Home

• Make sure there is a clear prescription stating the fluid, volume and rate.
• The infusion should be set up and supervised by a trained nurse or doctor.
• Know how the patient will be monitored — for example, checks of breathing, pulse, blood pressure, urine output and any blood tests.
• Know whom to contact, and what to do, if problems arise.
• Do not adjust the rate, add medicines to the fluid, or restart an infusion without professional advice.

Related Guides

• Injections at Home: Safety, Preparation and When They Are Appropriate
• Preventing Dehydration in Older Adults
• When Home Care Is Not Enough: Signs You Should Go to Hospital
• When Repeat Blood Tests Are Needed During Recovery at Home