No, antibiotics are not compatible with all vaccines when administered simultaneously.

Key points:

• Viral vaccines (modified live): Generally safe with most antibiotics

• Bacterial vaccines: Antibiotics may kill or weaken the vaccine bacteria, reducing effectiveness

• Specific incompatibilities: Tetracyclines, sulfonamides, and aminoglycosides can interfere with certain vaccines

Best practice: Separate antibiotic and vaccine administration by 3-5 days unless veterinarian confirms compatibility.