Ampicillin is injected into a muscle, or into a vein through an IV. You may be shown how to use an IV at home. Do not self-inject ampicillin if you do not understand how to give the injection and properly dispose of used needles, IV tubing, and other items used to inject the medicine.
You may need to mix ampicillin with a liquid (diluent) before using it. If you are using the injections at home, be sure you understand how to properly mix and store the medicine. You should use the injection as soon as possible after mixing it.
Use a disposable needle and syringe only once. Follow any state or local laws about throwing away used needles and syringes. Use a puncture-proof "sharps" disposal container (ask your pharmacist where to get one and how to throw it away). Keep this container out of the reach of children and pets.
If you are being treated for gonorrhea, your doctor may also have you tested for syphilis, another sexually transmitted disease.
Your doctor may switch you from ampicillin injection to an oral form of this medicine. Use this medicine for the full prescribed length of time. Your symptoms may improve before the infection is completely cleared. Skipping doses may also increase your risk of further infection that is resistant to antibiotics. Ampicillin will not treat a viral infection such as the flu or a common cold.
If you use this medicine long-term, you may need frequent medical tests.
Ampicillin can cause unusual results with certain lab tests for glucose (sugar) in the urine. Tell any doctor who treats you that you are using this medicine.
Store unmixed ampicillin at room temperature away from moisture and heat.
After mixing your medicine, you will need to use it within a certain number of hours. This will depend on the diluent used, and whether the mixture is stored at room temperature or in a refrigerator. Carefully follow the mixing and storage instructions provided with your medicine. Ask your pharmacist if you have questions.
Ampicillin (injection) Dosage information (more detail)