A blood test is needed before you start treatment with ZYFLO CR®
Liver function enzymes can increase while taking ZYFLO CR®. One study showed that liver enzymes increased in 1.8% of patients.
Your doctor will want to monitor your liver enzymes and watch for changes or elevations, a serious side effect of ZYFLO CR®. Liver enzymes can be measured by a blood test to report on how your liver is functioning.
- Before starting ZYFLO CR®
- Once a month for the first 3 months
- Every 2–3 months for the rest of the first year
- Periodically thereafter while you remain on the drug