Conversely, the longest median ALT was found for nitrofurantoin (3.10 h, IQR 1.30–4.92; 32/1000 patients) and ciprofloxacin (2.13 h, IQR 1.00–4.38; 26/1000 patients), both frequently prescribed for urinary tract infections (Supplementary Table 4). Here, GPT is linked to urinary tract infection.