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Study identifier: NCT07242092 Synced from ClinicalTrials.gov · July 28, 2026
● Recruiting

Influence of Methotrexate Discontinuation on Immunogenicity After PCV-20 Vaccine in Patients ARDs

Condition: Autoimmune Rheumatic Diseases  ·  Sponsor: University of Sao Paulo General Hospital

PhasePhase 4
Planned participants192
Who can joinAll sexes, 18 Years to 100 Years
Healthy volunteersNo

About this study

This clinical trial aims to evaluate the effect of temporary methotrexate (MTX) discontinuation on the humoral immunogenicity of the 20-valent pneumococcal conjugate vaccine (PCV20) in adult patients with autoimmune rheumatic diseases (ARDs). Key questions: * Does suspending MTX for 2 weeks after PCV20 enhance humoral immunogenicity? * What is the impact of MTX discontinuation on functional opsonophagocytic activity (OPA) and cellular immunity? * What is the risk of disease flaring with MTX withdrawal?

This description comes directly from the study's public registry record.

Talk to the study team

Clovis A Silva, Full Professor  ·  (11) 2661-6105  ·  vacina.reumatousp@gmail.com

Always discuss trial participation with your own doctor first.

Locations (1)

Reumatology division of Hospital das Clinicas da Faculdade de Medicina da Universidade de Sao PauloSão Paulo, São Paulo, BrazilRecruiting

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Source record: clinicaltrials.gov/study/NCT07242092