Table 3. Alterations in INR Following Antibiotic Administration.

	Total	≤ 4	Peak INR >4 - ≤ 6	> 6
High-risk Antibiotic (%)	22,381	20,061 (89.6)	1,748 (7.8)	572 (2.6)
TMP/SMX	2,828	2,538 (89.7)	227 (8.0)	63 (2.2)
Ciprofloxacin	6,844	6,195 (90.5)	514 (7.5)	135 (2.0)
Levofloxacin	3,343	2,972 (88.9)	279 (8.4)	92 (2.8)
Metronidazole	1,003	853 (85.0)	101 (10.1)	49 (4.9)
Fluconazole	381	291 (76.4)	53 (13.9)	37 (9.7)
Azithromycin	9,331	8,526 (91.4)	649 (7.0)	156 (1.6)
Clarithromycin	584	521 (89.2)	46 (7.9)	17 (2.9)
Co-prescribed High-risk	1,357	1,153 (85.0)	151 (11.1)	53 (4.0)
Co-prescribed High- and Low-risk	2,401	2,089 (87.0)	226 (9.4)	86 (3.6)
Low-risk Antibiotic (%)	12,973	11,799 (91.0)	931 (7.2)	243 (2.9)

INR = International Normalized Ratio

TMP/SMX = Trimethoprim/Sulfamethoxazole