Gentamicin injection should not be taken by mouth. The full name of gentamicin injection is gentamicin sulfate injection, which belongs to the injection class of drugs, if it enters the digestive tract through the mouth, it will occur with the interaction of digestive fluids leading to drug failure, or toxic effects on the digestive tract and so on, so it can only be injected intramuscularly or intravenously. The drug is an aminoglycoside antibiotic, which can bind to the 30s subunit of the bacterial ribosome, inhibit bacterial protein synthesis, and thus play an antibacterial role. It is suitable for infections caused by sensitive bacteria, such as sepsis, soft-tissue skin infections, intestinal infections, lower respiratory infections, central nervous system infections, and so on; it can also be injected into the sphincter for adjuvant treatment, such as meningitis, ventriculitis, and so on. Hearing loss, unsteady gait, tinnitus, dizziness, hematuria, decreased urine output, dyspnea, weakness, drowsiness, rash, nausea, decreased appetite, vomiting, hepatic hypoplasia, leukopenia, anemia, hypotension, fever, generalized spasms, and other adverse reactions may occur in the process of using the drug. The drug can cross the placental barrier into fetal tissues, may cause fetal hearing damage, so pregnant women should be fully considered before using the drug; in breast milk secretion is very small, but nursing women are still advisable to suspend breastfeeding when using the drug. It is contraindicated for those who are allergic to this drug or other aminoglycosides. Use with caution in children. If you need to use the drug patients, please be sure to strictly follow the doctor’s instructions under the guidance of the medication, do not self-medication.