IV antibiotics for pyelonephritis: what to know

IV antibiotics for pyelonephritis deliver medicine into a vein when a kidney infection needs rapid treatment or tablets are unsuitable. The clinician selects treatment using your examination, urine findings, allergies, kidney function and general health.

Pyelonephritis can cause fever, chills, pain in the side or back, nausea, and painful urination. A urine test may help identify bacteria and guide the antibiotic. The medicine enters through a cannula in the hand or arm, while the team watches your symptoms, hydration, urine output and response.

If you improve and can swallow and absorb medicine, treatment may change to tablets. Take the full prescribed course and tell the clinician about kidney disease, pregnancy, allergies or previous antibiotic reactions.

Rest and drink fluids only as advised, especially if you have another condition affecting fluid intake. Take each dose as prescribed. Report persistent vomiting, worsening side or back pain, reduced urine, a new rash, or soreness and redness around the cannula. Do not use someone else’s antibiotics or save doses for later.

Seek urgent care for confusion, fainting, severe weakness, difficulty breathing, inability to keep fluids down, or rapidly worsening pain or fever. After an antibiotic dose, emergency help is needed for facial swelling, wheezing or trouble breathing. Prompt review is also needed if symptoms are not settling or urine output falls.

Ask whether the infection involves the kidney, what the urine test shows, why IV treatment is needed, how kidney function will be monitored, and what changes would allow a switch to tablets.