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Pain Paid Clinical Trials in California
A listing of 139 Pain clinical trials in California actively recruiting volunteers for paid trials and research studies in various therapeutic areas.
37 - 48 of 139
The state of California currently has 139 active clinical trials seeking participants for Pain research studies. These trials are conducted in various cities, including Los Angeles, San Francisco, San Diego and Sacramento.
Featured Trial
Healthy Participants Needed (Colonoscopy + Cancer Screening)
Recruiting
Earn $325 - $475 in electronic payment card compensation for your time and effort by participating in a clinical study to develop a blood test that may one day help screen for colon cancer. Take a quick quiz to see if you qualify.
Conditions:
Healthy
Healthy Volunteers
Healthy Subjects
Healthy Volunteer
Healthy Participants
Featured Offer
Ketamine Therapy—At Home, Clinician-Guided (Innerwell)
If you’re exploring options besides a clinical trial, Innerwell provides at-home ketamine therapy with medical oversight and structured support. Ketamine-assisted treatment may help “reset” rigid stress and mood patterns, and some people feel relief within a few sessions. Your care team works with you to tailor treatment and track progress every step of the way. Proven effective for Anxiety, PTSD, Depression, Addiction, and other disease areas.
Conditions:
Anxiety
Anxiety Disorders
Generalized Anxiety Disorder
Depression
Depression
Featured Trial
Buy Retatrutide Online Through Celia
Recruiting
Retatrutide (formerly M25) is an investigational peptide being studied for its potential in supporting weight management and metabolic health. It acts on GLP-1, GIP, and glucagon receptors to influence appetite, energy regulation, and fat metabolism.
Conditions:
Healthy
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Semaglutide and Tirzepatide are advanced GLP-1 medications designed to support weight management and metabolic health. They work by targeting GLP-1 receptors in the body, helping regulate appetite, improve blood sugar control, and support sustainable weight loss (up to 22% of body weight).
Get $50 off your first order using promo code: policy-lab-50
Conditions:
Overweight
Overweight and Obesity
Obesity
Weight Loss
Morbid Obesity
Featured Trial
Birth Control Clinical Research Study
Recruiting
Living with obesity and looking for a birth control option that is right for you? Clinical trials are now enrolling women with a body mass index (BMI) of 30 or more in the area to help study a potential new progestin-only contraceptive patch. Participating in research studies can help advance birth control options. Don’t let financial stress hold you back. All study-related assessments, care, and study patch are available at no cost. You may also be reimbursed for study-related travel.
Conditions:
Obesity
Overweight
Overweight and Obesity
Featured Trial
Depression Clinical Trial
Recruiting
Join us in researching a potential investigational treatment for Depression. Reimbursement for study-related expenses may be available to you.
Qualifying participants:
•Are between 18-65
•Have been experiencing a major depressive episode for at least a month
Qualifying participants:
•Are between 18-65
•Have been experiencing a major depressive episode for at least a month
Conditions:
Depression
Major Depressive Disorder
Depressive Disorder
Depressive Symptoms
Depressive Disorder
Strain-Counterstrain Treatment of Piriformis Pain
Recruiting
The purpose of this investigator-initiated study is to provide an efficient and non-invasive treatment option for pain caused by the piriformis muscle.
Gender:
ALL
Ages:
Between 18 years and 65 years
Trial Updated:
06/24/2025
Locations: Loma Linda University Health, Loma Linda, California
Conditions: Low Back Pain, Mechanical, Piriformis Syndrome, Somatic Dysfunction of Sacral Region (Finding)
Safety, Efficacy, and Frequency of Administration of VNX001 in the Treatment of Interstitial Cystitis / Bladder Pain Syndrome (IC/BPS)
Recruiting
This is an open-label study that will enroll participants with Interstitial Cystitis / Bladder Pain Syndrome (IC/BPS).
The study will assess PRN (as needed) dosing of up to 6 intravesical (via catheter) doses of VNX001 (study drug) to treat acute instances of moderate to severe bladder pain over a 14-day period. The main aim of the study is to tally the number of doses and assess pain before and after doses. The study will review the safety and tolerability of VNX001.
Participants will need to... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
06/24/2025
Locations: Valley Urology, Inc., Fresno, California +1 locations
Conditions: Interstitial Cystitis, Bladder Pain Syndrome
Long-Term Real-World Outcomes Study on Patients Implanted With a Neurostimulator
Recruiting
The REALITY study is a prospective, post-market, non-randomized, multi-center, single-arm, open-label study intended to collect short- and long-term safety and effectiveness data on various populations implanted with Abbott's neurostimulation systems.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
06/19/2025
Locations: California Orthopedics & Spine, Larkspur, California +3 locations
Conditions: Chronic Pain
Phase I Single Ascending Dose and Multiple Ascending Doses of Oral AFA-281 in Healthy Volunteers
Recruiting
Phase I Part 1 (single ascending dose):
Double-blind dosing will occur in healthy volunteers in 4 cohorts of 8 subjects each. Six subjects in each cohort will be randomized to receive AFA-281 and 2 subjects will be randomized to receive the matching placebo. At the end of the Part 1 study is to evaluate the safety and tolerability of AFA-281. Following completion of each cohort, bioanalytical analyses will be conducted to evaluate the pharmacokinetic profile.
Phase I Part 2 (multiple dose for... Read More
Gender:
ALL
Ages:
Between 18 years and 65 years
Trial Updated:
06/18/2025
Locations: CenExcel CNS, Los Alamitos, California
Conditions: Pain, Neuropathic, Pain, Inflammatory
Examination of Nociscan Impact on Discogenic Low Back Pain Surgical Outcomes
Recruiting
This study is looking into how safe and useful NOCISCAN is. NOCISCAN is a software as a Service (SaaS) tool that uses Magnetic Resonance (MR) spectroscopy. Nociscan (instead of 'It') leverages MRS to noninvasively help physicians distinguish between painful and nonpainful discs in the lumbar spine. The randomized controlled trial will compare the blinded and unblinded cohorts and their corresponding surgical outcomes with the Nocigram reports, generated prior to treatment, for each patient."
Gender:
ALL
Ages:
Between 18 years and 70 years
Trial Updated:
06/18/2025
Locations: Scripps Health, La Jolla, California
Conditions: Discogenic Low Back Pain
Continuous Versus Single Injection Adductor Canal Blocks for Outpatient Total Knee Arthroplasty
Recruiting
This is a single-center pilot study to determine if an adductor canal continuous nerve block is superior to single injection nerve block following total knee arthroplasty. Investigators will randomize participants to either continuous nerve block or single injection nerve block for the adductor canal preoperatively. They will assess differences in pain (measured in numeric rating scale), opioid consumption, and physical therapy milestones from postoperative day 0 to 7.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
06/12/2025
Locations: University of California, San Diego, La Jolla, California
Conditions: Acute Postoperative Pain, Surgery
Transcranial Magnetic Stimulation for Chronic Neuropathic Pain
Recruiting
Chronic neuropathic pain is defined as pain caused by a lesion or disease of the somatosensory nervous system. It is highly prevalent, debilitating, and challenging to treat. Current available treatments have low efficacy, high side effect burden, and are prone to misuse and dependence. Emerging evidence suggests that the transition from acute to chronic neuropathic pain is associated with reorganization of central brain circuits involved in pain processing. Repetitive transcranial magnetic stim... Read More
Gender:
ALL
Ages:
Between 18 years and 80 years
Trial Updated:
06/10/2025
Locations: UCSF Medical Center, San Francisco, California
Conditions: Chronic Neuropathic Pain, Post-Stroke Pain, Trigeminal Neuralgia, Nerve Injury, Spinal Cord Injuries, Pain, Postoperative, Complex Regional Pain Syndromes, Post-herpetic Neuralgia, Nerve Root Avulsion
Empathy Through Pain Control: Lidocaine Paracervical Block for IUD Placements
Recruiting
The goal of this research study is to learn more about how different uses of a numbing medication might affect pain levels while getting an IUD placed. The investigators are also studying participants opinions of their clinicians' empathy.
The investigators are inviting patients who arrive at their clinic visit seeking an IUD.
Usually, at University of California, San Diego (UCSD), for patients who have never delivered a baby, clinicians use a buffered paracervical block for before IUD placeme... Read More
Gender:
FEMALE
Ages:
Between 18 years and 50 years
Trial Updated:
06/10/2025
Locations: University of California, San Diego, La Jolla, California
Conditions: Contraception, Pain, Acute, Anesthesia, Local
LGMD R1 Natural History Study
Recruiting
This is a 24-month, observational study of 100 participants with Limb Girdle Muscular Dystrophy type R1, also known as CAPN3.
Gender:
ALL
Ages:
Between 12 years and 50 years
Trial Updated:
06/06/2025
Locations: University of California, Irvine, Orange, California
Conditions: Calpain-3 Deficiency Limb Girdle Muscular Dystrophy Type 2A, Limb Girdle Muscular Dystrophy, Limb Girdle Muscular Dystrophy Type R1, LGMD2A
Evaluation of Patients With Non-obstructive Coronary Arteries
Recruiting
Patients with angina and non-obstructive CAD are common within clinical practice, but remain a challenge with regard to diagnosis and treatment. When these patients undergo a comprehensive evaluation at the time of invasive coronary angiography, occult coronary abnormalities are frequently found. We hope to learn the overall prevalence and presentation of these occult coronary abnormalities and its long term outcome in this patient population.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
06/02/2025
Locations: Stanford University School of Medicine, Stanford, California
Conditions: Chest Pain, Ischemia
Low-Dose Naltrexone for the Treatment of Complex Regional Pain Syndrome
Recruiting
The investigators are testing treatment with low-dose naltrexone (LDN) for symptom relief of complex regional pain syndrome (CRPS). Study participants will be randomly assigned to receive either LDN or placebo for a period of several weeks. During this period participants will be asked to attend either in-person or virtual study visits and complete questionnaires.
Gender:
ALL
Ages:
Between 18 years and 70 years
Trial Updated:
05/27/2025
Locations: Stanford University, Palo Alto, California
Conditions: Complex Regional Pain Syndrome
Valacyclovir in Pain Management of Acute Apical Abscesses
Recruiting
The Virus in Endodontics (VE) phase I pilot study for preoperative pain will be analyzed and adjusted for the Phase II clinical trial. The Phase II clinical trial on preoperative pain, postoperative pain, and clinical healing will involve 250 patients. Patients will be recruited from the same pool of participants as the Phase II clinical trial. Preoperative cone beam computed tomography (CBCT) scans will be taken as well as three and six month postoperative CBCT scans. The secondary outcomes for... Read More
Gender:
ALL
Ages:
Between 18 years and 80 years
Trial Updated:
05/23/2025
Locations: UCSF Dental, San Francisco, California
Conditions: Acute Apical Abscess, Pain, Acute
37 - 48 of 139
