A nurse in a clinic is assessing a 60-year-old client at an annual examination. The client asks the nurse about receiving a shingles vaccination. The nurse should identify that which of the following medications prescribed to the client is a contraindication for receiving this vaccine?

B. Methotrexate is a contraindication for live attenuated vaccines like Zostavax. It suppresses the immune system, which can reduce the effectiveness of the vaccine and increase the risk of developing the infection from the vaccine strain.A. Metformin is not a contraindication for receiving the shingles vaccine. It does not affect the immune system in a way that would interfere with the vaccine's efficacy or safety.C. Estrogen therapy is not a contraindication for the shingles vaccine. It does not affect the immune system in a manner that would interfere with the vaccine's efficacy or safety.D. Esomeprazole is not a contraindication for the shingles vaccine. It does not affect the immune system or interact with the vaccine in a way that would make the vaccine unsafe or less effective.