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Yes, completely free. GuineaPig pulls data from ClinicalTrials.gov and adds compensation estimates, eligibility matching, and category filters to make it easier to browse. We don't charge volunteers or collect payment information.

How does GuineaPig estimate compensation?

Pay ranges are rough estimates based on the study's phase, duration, and typical industry rates. Phase 1 inpatient studies tend to pay the most because they require overnight stays. These are not confirmed by sponsors — always contact the study team directly for the actual compensation.

How often is trial data updated?

Trial listings are pulled from ClinicalTrials.gov in real time. New studies appear as soon as sponsors register them with the NIH. Study status, enrollment counts, and location data are updated whenever sponsors submit changes to the registry.

Does GuineaPig screen me or sign me up?

No. GuineaPig is a search tool only. When you find a trial you're interested in, click 'View on ClinicalTrials.gov' to get the study team's contact information. You'll go through the sponsor's own screening and enrollment process.

Clinical Trials inSan Antonio, TX

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Top Trials Near San Antonio

RESTOR: PK/PD mTORi Inhibition in Older Adults

Glucagon-like Peptide 1, Glucose Metabolism and Gastric Bypass

A Study of Multiple Olomorasib (LY3537982) Capsules in Healthy Participants

A Clinical Trial to Evaluate the Effect of Ulonivirine (MK-8507) on Heart Rhythm in Healthy Adults (MK-8507-012)

Role of Neural and Hormonal Regulation Factors on Insulin Secretion After Gastric Bypass Surgery

The Effects of Bariatric Surgeries on Glucose Metabolism

Safety and Immunogenicity of a Self-Amplifying RNA Vaccine Against Crimean-Congo Hemorrhagic Fever

Study of GS-4571 in Healthy Participants, Nondiabetic Obese Participants, and Nonobese Participants With Type 2 Diabetes Mellitus (T2DM)

Safety, Tolerability, Pharmacokinetics And Pharmacodynamics of SUVN-I6107 In Healthy Participants

A Study to Assess Zilucoplan Concentration in Breast Milk of Healthy Lactating Women

A Study to Evaluate Safety, Tolerability and Pharmacokinetics of MKND-201 in Healthy Volunteers

A Study to Assess the Bioequivalence of Follitropin Alfa Solution in Pen and Follitropin Alfa Powder in Vial in Healthy Downregulated Male Participants

The Effect of Outpatient Ketamine Infusion on Chronic Neuropathic Pain and PTSD

Pioglitazone on Heart Failure in Type-2 Diabetes Mellitus Participants

Effects of Pregnancy-Specific Anxiety on Placental Inflammatory and Oxidative Stress Response and Birth Outcomes

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