Telmisartan in Prostate Cancer

Inclusion Criteria16

• Participants must be ≥18 years of age.
• Participants must be able and willing to provide informed consent or have a surrogate capable of providing same.
• Participants must not require immediate change in SOC treatment, i.e., patients with stable PSA (do not meet PCWG310 criteria for PSA progression), or with rising PSA but they remain on SOC treatment (defined as having met PCWG3 criteria for PSA progression, but do not have clinical/radiographic progression and have not met criteria for an immediate change in therapy based on PSA doubling time) as determined by their primary oncologist
• Participants must be receiving or likely to receive one of the following SOC agents for PC:
• cabazitaxel, docetaxel (alone or plus abiraterone) olaparib, rucaparib, or talazoparib plus enzalutamide
• Participants must have
• ECOG performance status of 0-2
• Adequate hepatic (SCOT ≤3x ULN) and renal function (serum creatinine ≤2.5 or estimated GFR \>30 cc/min)
• Standing systolic blood pressure \>/= 110mm Hg
• If not on active surveillance, patient mut have castrate level testosterone
• No contraindication to telmisartan, including ACE inhibitor use in the 6 weeks prior to projected telmisartan start on trial
• All participants must have a systolic blood pressure \>110 mm Hg during study enrollment assessment and throughout the study
• If participants are concurrently treated for hypertension, they must be able to allow telmisartan in addition to, or replacing their antihypertensive regimen
• Participants must be able to withstand planned research phlebotomies (Hb \>10 gm/dl).
• Participants must have a blood prostate specific antigen \> 1 ng/ml at study entry using the Roche Cobas immunoassay.
• Participants must be able to take or have taken their own blood pressure per the study protocol (daily during telmisartan escalation and for two weeks after the final escalation and weekly thereafter for the following month and then monthly) if normotensive at enrollment.