Dosage adjustments for Fildena 100mg in patients with renal impairment are typically based on the severity of renal dysfunction. For example, a lower starting dose may be recommended for patients with moderate to severe renal impairment, with further dose titration based on individual response and tolerability. In patients undergoing dialysis, Fildena 100 may be administered after dialysis sessions to minimize drug accumulation and reduce the risk of adverse effects.