Your doctor will check your progress closely while you or your child are receiving this medicine. This will allow your doctor to see if the medicine is working properly and to decide if you or your child should continue to receive it. Blood, urine, hearing, and nerve tests may be needed to check for unwanted effects.
If your or your child's symptoms do not improve within a few days, or if they become worse, check with your doctor.
Using this medicine while you are pregnant can harm your unborn baby. Use an effective form of birth control to keep from getting pregnant. If you think you have become pregnant while using the medicine, tell your doctor right away.
This medicine may cause serious allergic reactions, including anaphylaxis, which can be life-threatening and require immediate medical attention. Call your doctor right away if you or your child have itching; hives; hoarseness; shortness of breath; trouble breathing; trouble swallowing; or any swelling of your hands, face, or mouth after you receive this medicine.
Stop using this medicine and check with your doctor right away if you or your child have sudden decrease in hearing or loss of hearing, which may be accompanied by dizziness and ringing in the ears. Tell your doctor if you or your child have dizziness or lightheadedness; feeling of constant movement of self or surroundings; or sensation of spinning. These may be symptoms of a damage to your hearing or sense of balance.
Check with your doctor right away if you or your child have blood in the urine, change in frequency of urination or amount of urine, difficulty with breathing, drowsiness, increased thirst, loss of appetite, nausea or vomiting, swelling of feet or lower legs, or weakness. These may be symptoms of a serious kidney problem (e.g., Fanconi-like syndrome).
This medicine may cause nerve problems. Check with your doctor right away if you or your child have numbness, skin tingling, muscle twitching, or convulsions.
Make sure your doctor knows that you are using this medicine before having a surgery or other procedures that require you to receive a numbing medicine (e.g., anesthetics, neuromuscular blocking agents). Using gentamicin injection together with numbing medicines may increase your risk of having difficulty in breathing, drowsiness, inability to breath without assistance, or unusual tiredness or weakness.
Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal or vitamin supplements.