Is GuineaPig free to use?

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.

Pharmaceutical Drug Studies
for Healthy Volunteers

Phase 1 drug studies are the backbone of pharmaceutical development and pay the most. Big pharma companies need healthy volunteers to test how new drugs work.

4,607

Active Trials

$3,000 - $12,000

Typical Pay (estimated)

2-6 weeks

Duration

Highest paying category for healthy volunteers

Featured Trial

Highest Paying in Category

$1,950 – $18,000

Estimated compensation

A Study to Assess the Relative Bioavailability of BMS-986435 and Food Effect on the BMS-986435 in Healthy Adult Participants

Bristol-Myers Squibb

MiamiPhase 1140 enrolling

View trial details

All Pharmaceutical Trials

View all 4,607

N/A

$50 – $1,000

Est. compensation

The Effects of Scapular Stabilization Exercises in Traditional Archery Athletes

Karabuk University

Bursa, Osmangazi̇30 enrolling

Phase 4

$100 – $1,500

Est. compensation

Period Pills for Menstrual Regulation: A New Reproductive Health Option

University of California, San Francisco

Oakland, California100 enrolling

Observational

$25 – $500

Est. compensation

Harm Reduction in HIV Primary Care for PLWH Who Use Drugs

University of Pittsburgh

Birmingham, Alabama768 enrolling

High PayingPhase 1

$2,500 – $12,000

Est. compensation

To Evaluate the Pharmacokinetics of Hemay005 Tablets in Subjects With Liver Damage

Ganzhou Hemay Pharmaceutical Co., Ltd

Wuhan, Hubei24 enrolling

Phase 3

$200 – $3,000

Est. compensation

Efficacy of a Potassium Nitrate Containing Herbal Mouthwash to a Potassium Oxalate Mouthwash in Dentinal Hypersensitivity

Dr. D. Y. Patil Dental College & Hospital

Pune, Maharashtra40 enrolling

N/A

$50 – $1,000

Est. compensation

Comparing Two School-Based Sleep Health Interventions To Promote Sleep Quality in Youth

Children's Hospital Los Angeles

Los Angeles, California1,320 enrolling

High PayingPhase 2

$500 – $7,000

Est. compensation

Evaluation of Antimicrobial Prophylaxis to Prevent Syphilis in Pregnancy in Patients at Risk in Rio de Janeiro, Brazil

University of California, Los Angeles

Duque de Caxias, Rio de Janeiro500 enrolling

N/A

$50 – $1,000

Est. compensation

Challenging the Endocannabinoid System in Sleep Restricted Healthy Volunteers to Modulate Physiological Arousal (CANISLEEP) Study

King's College London

London, London60 enrolling

N/A

$50 – $1,000

Est. compensation

Gut Microbiota-Mediated Inflammatory Interactions Between AUD and HIV Infection

Rush University Medical Center

Chicago, Illinois40 enrolling

High PayingPhase 1

$1,500 – $12,000

Est. compensation

A Study of Safety and Drug Levels of ePGT121v1-LS, PGDM1400LS, and VRC07-523LS in Adult Participants Without HIV-1

National Institute of Allergy and Infectious Diseases (NIAID)

Birmingham, Alabama83 enrolling

High PayingPhase 1

$1,500 – $12,000

Est. compensation

A Study to Test How Different Doses of BI 3814916 Are Tolerated by Healthy People

Boehringer Ingelheim

Edegem136 enrolling

View all 4,607 trials

Explore Other Categories

Psychedelic Vaccine Weight Loss Diet & Nutrition Brain & Neuroscience

Learn more: How Much Do Trials Pay? · First-Timer's Guide

GuineaPig pulls live data from ClinicalTrials.gov (NIH/NLM). Pay estimates are approximate ranges based on study type and are not confirmed by sponsors. Eligibility indicators use limited criteria only. We do not provide medical advice. Always contact the study team directly to confirm compensation, full eligibility, and risks before enrolling.

Pharmaceutical Drug Studiesfor Healthy Volunteers

Featured Trial

A Study to Assess the Relative Bioavailability of BMS-986435 and Food Effect on the BMS-986435 in Healthy Adult Participants

All Pharmaceutical Trials

The Effects of Scapular Stabilization Exercises in Traditional Archery Athletes

Period Pills for Menstrual Regulation: A New Reproductive Health Option

Harm Reduction in HIV Primary Care for PLWH Who Use Drugs

To Evaluate the Pharmacokinetics of Hemay005 Tablets in Subjects With Liver Damage

Efficacy of a Potassium Nitrate Containing Herbal Mouthwash to a Potassium Oxalate Mouthwash in Dentinal Hypersensitivity

Comparing Two School-Based Sleep Health Interventions To Promote Sleep Quality in Youth

Evaluation of Antimicrobial Prophylaxis to Prevent Syphilis in Pregnancy in Patients at Risk in Rio de Janeiro, Brazil

Challenging the Endocannabinoid System in Sleep Restricted Healthy Volunteers to Modulate Physiological Arousal (CANISLEEP) Study

Gut Microbiota-Mediated Inflammatory Interactions Between AUD and HIV Infection

A Study of Safety and Drug Levels of ePGT121v1-LS, PGDM1400LS, and VRC07-523LS in Adult Participants Without HIV-1

A Study to Test How Different Doses of BI 3814916 Are Tolerated by Healthy People

Explore Other Categories

Pharmaceutical Drug Studiesfor Healthy Volunteers

Featured Trial

A Study to Assess the Relative Bioavailability of BMS-986435 and Food Effect on the BMS-986435 in Healthy Adult Participants

All Pharmaceutical Trials

The Effects of Scapular Stabilization Exercises in Traditional Archery Athletes

Period Pills for Menstrual Regulation: A New Reproductive Health Option

Harm Reduction in HIV Primary Care for PLWH Who Use Drugs

To Evaluate the Pharmacokinetics of Hemay005 Tablets in Subjects With Liver Damage

Efficacy of a Potassium Nitrate Containing Herbal Mouthwash to a Potassium Oxalate Mouthwash in Dentinal Hypersensitivity

Comparing Two School-Based Sleep Health Interventions To Promote Sleep Quality in Youth

Evaluation of Antimicrobial Prophylaxis to Prevent Syphilis in Pregnancy in Patients at Risk in Rio de Janeiro, Brazil

Challenging the Endocannabinoid System in Sleep Restricted Healthy Volunteers to Modulate Physiological Arousal (CANISLEEP) Study

Gut Microbiota-Mediated Inflammatory Interactions Between AUD and HIV Infection

A Study of Safety and Drug Levels of ePGT121v1-LS, PGDM1400LS, and VRC07-523LS in Adult Participants Without HIV-1

A Study to Test How Different Doses of BI 3814916 Are Tolerated by Healthy People

Explore Other Categories

Pharmaceutical Drug Studies
for Healthy Volunteers

Pharmaceutical Drug Studies
for Healthy Volunteers