| Time After Starting | Time After Stopping | ALT* (U/L) | Alk P* (U/L) | Bilirubin* (mg/dL) | Other |
|---|---|---|---|---|---|
| Sildenafil used several times per week for 3 months before onset of symptoms | |||||
| 3 months | 0 | 1665 | 173 | 5.2 | Outpatient evaluation |
| 1 week | 120 | 140 | 7.9 | ||
| 4 months | 4 weeks | 59 | 150 | 15.0 | Hospitalization |
| 7 weeks | 70 | 210 | 17.8 | Severe pruritus | |
| 5 months | 8 weeks | 65 | 145 | 19.0 | Liver biopsy |
| 9 weeks | 40 | 125 | 13.5 | ||
| 6 months | 10 weeks | 35 | 105 | 5.6 | |
| 14 weeks | 30 | 90 | 1.5 | ||
| 7 months | 4 months | 20 | 75 | 0.7 | |
| 8 months | 5 months | 25 | 75 | 0.7 | Asymptomatic |
| Normal Values | <40 | <100 | <1.2 | ||
From: Sildenafil
NCBI Bookshelf. A service of the National Library of Medicine, National Institutes of Health.