FDA Section 5 \u2022 cited verbatim

Famciclovir - Warnings and Precautions

The following warnings and precautions are taken directly from the US FDA-approved drug label for Famciclovir. This is the same information dispensing pharmacists read.

5 WARNINGS AND PRECAUTIONS Acute renal failure: May occur in patients with underlying renal disease who receive higher than recommended doses of famciclovir for their level of renal function.

Reduce dosage in patients with renal impairment. ( 2.3 , 8.6 ) 5.1 Acute Renal Failure Cases of acute renal failure have been reported in patients with underlying renal disease who have received inappropriately high doses of famciclovir for their level of renal function.

Dosage reduction is recommended when administering famciclovir to patients with renal impairment [see Dosage and Administration , Use in Specific Populations ].

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