What should you know about IV antibiotics for appendicitis?

Appendicitis is inflammation and infection involving the appendix. Antibiotics delivered into a vein act while the team assesses your pain, examination findings, blood tests, and scans. They may be started before an operation, used when an operation needs to wait, or considered as part of a carefully selected non-surgical plan.

IV medicine does not make abdominal pain safe to ignore. The appendix can worsen or rupture, allowing infection to spread inside the abdomen. Your surgeon will explain whether removing the appendix is advised, whether observation is reasonable, and how you will be monitored.

You may be asked not to eat or drink in case an operation is needed. An IV line allows antibiotics, fluids, and pain relief to be given while the team reassesses you. Tell staff about allergies, pregnancy, previous abdominal surgery, and all medicines you take.

Do not take antibiotics left from an earlier illness or delay assessment to try them at home. Follow instructions about food, movement, and discharge. If you leave hospital with tablets or a follow-up plan, complete the prescribed course and attend the review. [Cellulitis](/conditions/cellulitis/) is a different infection, so its treatment should not be used as a guide for abdominal pain.

Seek emergency care for severe or steadily worsening pain, a rigid or very tender abdomen, repeated vomiting, faintness, confusion, or difficulty breathing. Fever with shaking chills or feeling suddenly very unwell also needs urgent assessment.

After treatment, return promptly if pain comes back, the wound becomes increasingly red or drains, vomiting prevents fluids, or you cannot pass urine. A temporary improvement after antibiotics does not remove the need to follow the surgical or medical plan.

Ask whether the scan suggests a complication, why IV antibiotics are being recommended, and what would make surgery necessary. Check when you may eat or drink, how pain will be monitored, which symptoms mean you should return, and who will arrange follow-up.