Injections at Home: Safety, Preparation and When They Are Appropriate

When Are Injections Needed?

Some medicines can only be given by injection because they would be broken down in the stomach, or because they need to act in a particular way. Examples include insulin, some blood-thinning medicines, certain antibiotics, some vitamin replacements and certain long-acting treatments. Other patients need injections because they cannot swallow or keep tablets down.

For many common problems — pain, fever, colds and minor infections — tablets or other forms of medicine work just as well as an injection when they can be taken by mouth. An injection is not a sign of better treatment, and it carries its own risks, such as pain, bruising, infection at the injection site and allergic reactions. It is reasonable to ask the doctor why an injection is being recommended.

When Home Injections Are Appropriate

Injections at home can be a safe and convenient option when:

• The medicine has been prescribed for the patient by a doctor, with a clear dose, route and schedule.
• The patient is stable and does not need hospital-level monitoring.
• The person giving the injection has been trained, whether a nurse, a doctor, the patient or a family member.
• The medicine can be stored correctly at home.

For some medicines — particularly those with a higher risk of serious allergic reaction — the first dose is often given in a setting where emergency treatment is immediately available. Ask the doctor whether this applies. Sineth Hospitals' home injection service page describes nursing support for prescribed injections at home.

Types of Injection

Injections are given by different routes. Subcutaneous injections go into the fatty layer under the skin; insulin and some blood thinners are given this way, and patients or caregivers are often trained to give them. Intramuscular injections go deeper into a muscle and intravenous injections go directly into a vein; these generally require a trained nurse or doctor. Never give a medicine by a different route from the one prescribed.

Preparing Safely

• Check the prescription. Confirm the patient's name, medicine, dose, route and time before every injection.
• Check the medicine. Look at the name and strength on the label, the expiry date, and whether the solution looks as expected — for example, clear rather than cloudy, unless the leaflet says otherwise.
• Wash hands and prepare a clean surface.
• Use a new needle and syringe each time. Never share needles or pens between people, even if the needle has been changed.
• Rotate injection sites for repeated subcutaneous injections such as insulin. Injecting repeatedly into the same area can cause lumps under the skin that affect how the medicine is absorbed.

Storing Medicines Correctly

Many injectable medicines, including insulin, must be stored according to the manufacturer's instructions. Unopened insulin is usually kept in a refrigerator but must never be frozen. Once in use, some insulin pens can be kept at room temperature for a limited period, but should be protected from heat and direct sunlight — a particular concern in a hot climate. Do not use a medicine that has been frozen, overheated or kept beyond its in-use period. Check the leaflet or ask a pharmacist if unsure.

Disposing of Needles Safely

Used needles and syringes must not be placed in household rubbish where they could injure someone. Put them immediately into a rigid, puncture-resistant container with a secure lid, such as a purpose-made sharps bin. Do not recap, bend or break needles.

Keep the container out of reach of children and ask your nurse, clinic or pharmacist how to dispose of it when it is full.

After the Injection

Mild redness, tenderness or a small bruise at the injection site is common. Contact a doctor or nurse if the site becomes increasingly red, hot, swollen or painful, or if a lump persists, as these may indicate infection or another problem.

Record each injection — date, time, dose and site — especially when several people share the responsibility, to avoid missed or double doses.

Related Guides

• IV Fluids at Home: When They May Be Used and When They Can Be Dangerous
• How to Check Blood Sugar at Home and Avoid Common Errors
• Medicines After Hospital Discharge: Avoiding Common Mistakes
• Wound Care at Home: What Patients and Families Should Know