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Label Changes for:

Prezista (darunavir) Tablets

October 2011

Changes have been made to the ADVERSE REACTIONS and PATIENT PACKAGE INSERT sections of the safety label.

Detailed View: Safety Labeling Changes Approved By FDA Center for Drug Evaluation and Research (CDER) – April and December 2010, and October 2011


October 2011



  • Patients should be informed that Drug-induced hepatitis (e.g., acute hepatitis, cytolytic hepatitis) has been reported with PREZISTA co-administered with 100 mg of ritonavir. Monitor liver function before and during therapy, especially in patients with underlying chronic hepatitis, cirrhosis, or in patients who have pre-treatment elevations of transaminases. Post-marketing cases of liver injury, including some fatalities, have been reported. Patients should be advised about the signs and symptoms of liver problems. These may include jaundice of the skin or eyes, dark(tea colored) urine, pale colored stools, nausea, vomiting, loss of appetite, or pain, aching or sensitivity in the right upper quadrant of the abdomen.
Severe Skin Reactions
  • Patients should be informed that skin reactions ranging from mild to severe, including Stevens-Johnson Syndrome and toxic epidermal necrolysis, have been reported with PREZISTA co-administered with 100 mg of ritonavir. Patients should be advised to discontinue PREZISTA/ritonavir immediately if signs or symptoms of severe skin reactions develop. These can include but are not limited to severe rash or rash accompanied with fever, general malaise, fatigue, muscle or joint aches, blisters, oral lesions, conjunctivitis, hepatitis and/or eosinophilia.


April 2010



Table 2: Drugs That Are Contraindicated With PREZISTA/ritonavir
  • Alpha 1-adrenoreceptor antagonist- alfuzosin: Potential for serious and/or life-threatening reactions such as hypotension.
  • PDE5 Inhibitors: Sildenafil for treatment of pulmonary arterial hypertension; A safe and effective dose for the treatment of pulmonary arterial hypertension has not been established with Prezista/ritonavir. There is an increased potential for sildenafil-associated adverse events (which include visual disturbances, hypotension, prolonged erection, and syncope).



Table 7: Established and Other Potentially Significant Drug Interactions: Alterations in Dose or Regimen May Be Recommended Based on Drug Interaction Studies or Predicted Interaction
  • Inhaled beta agonist-salmeterol: Concurrent administration of salmeterol and Prezista/ritonavir is not recommended. The combination may result in increased risk of cardiovascular adverse events associated with salmeterol, including QT prolongation, palpitations and sinus tachycardia. 
  • Endothelin receptor antagonists-Bosentan: new dosing recommendations for bosentan when prescribed with Prezista/ritonavir.
  • PDE5 inhibitors: Use of PDE5 inhibitors for pulmonary arterial hypertension (PAH): Use of Revatio, (sildenafil) for the treatment of pulmonary hypertension dosing recommendations in table.
  • Colchicine (Antigout): Patients with renal or hepatic impairment should not be given colchicine with Prezista/ritonavir. Addition of new dosing recommendations for colchicine when prescribed for the prophylaxis of gout and for for the treatment of familial Mediterranean fever or gout.