Questions You've
Probably Asked Yourself.

A clinical trial is a research study in which volunteers help answer specific questions about a new medicine, device, or treatment approach. Researchers use trials to figure out whether something new is safe, whether it works, and how it compares to current options.

There are two main types:

• Interventional trials — participants receive a specific treatment (like a new drug) so researchers can measure its effect.
• Observational studies — researchers watch what happens during participants' normal care, without assigning a treatment.

Every trial has a detailed plan called a protocol that spells out exactly what happens, who can participate, and how data is collected.

Clinical trials happen in four phases. Each one answers a different question:

• Phase I — Is it safe? Tested in 20–80 healthy volunteers or patients. Focus is on safety and finding the right dose.
• Phase II — Does it work? Tested in 100–300 people with the condition. Focus is on effectiveness and continued safety monitoring.
• Phase III — How does it compare? Tested in 1,000–3,000 people across many sites. Confirms effectiveness and compares it to existing treatments. This is where MedX most often participates.
• Phase IV — What happens in the real world? After FDA approval, researchers keep tracking safety and benefits in the general population.

Clinical trials are sponsored and funded by organizations — usually pharmaceutical companies, biotech firms, the National Institutes of Health (NIH), or academic medical centers. Each trial is run by a team at specific sites led by a Principal Investigator (PI), a physician responsible for the study at that location.

At MedX sites, the PI is the physician you already see. You're in familiar hands.

Every medicine on pharmacy shelves today went through clinical trials. Without volunteers, there would be no way to know if new treatments actually work or are safe. Clinical trials are the only way medicine moves forward — and they're especially important for communities that have historically been underrepresented in research, because new treatments need to be tested on people who reflect the real world.

Clinical trials are designed with extensive safety protections. Before any trial begins:

• The treatment has already been tested in the lab and often in earlier-phase trials
• An Institutional Review Board (IRB) — an independent committee of doctors, scientists, and community members — reviews and approves the study plan
• The FDA oversees the trial's conduct
• Researchers monitor your health throughout the study and are required to report any safety concerns

That said, every medical treatment carries some risk. Your informed consent document explains the specific risks of each trial in detail, so you can make a fully informed choice.

Informed consent is a process — not just a form. Before you enroll in any trial, a coordinator and/or physician walks you through:

• The purpose of the study
• What will happen at each visit
• Every known risk and expected benefit
• What happens if something goes wrong
• How your privacy will be protected
• What compensation you'll receive
• Your rights as a participant, including the right to withdraw

You receive all this information in writing, in a language you understand. You only sign after every question is answered — and you can take the document home to discuss with family first if you want.

Yes. At any time. For any reason. No penalty.

Even after signing the consent form and starting a trial, you can withdraw whenever you want. You don't have to explain why. Your regular care continues uninterrupted, and you will not be treated any differently by your doctor.

Your medical information is protected by federal law (HIPAA). Only authorized members of the research team have access to your full identity. When data is shared with the study sponsor or regulators, it's de-identified — your name and personal details are removed and replaced with a study ID code.

Your name never appears in trial publications, sponsor reports, or public databases.

If you experience side effects or complications, your study team is trained and equipped to respond immediately. Serious safety issues are reported to the IRB, the sponsor, and the FDA — and in some cases can pause or end a trial early to protect participants.

Your consent form explains who covers medical costs if a trial-related injury occurs. Your coordinator can walk you through this before you enroll.

You have several options:

• Contact MedX directly — We'll walk you through what's currently recruiting in the Houston area and help you determine if you might qualify
• Ask your doctor — Your physician may know of trials that fit your condition
• Search ClinicalTrials.gov — The U.S. government's free database of every registered clinical trial, searchable by condition and location

The first visit is called a screening visit. The coordinator will:

• Explain the trial in detail, in your preferred language
• Review your medical history and current medications
• Perform basic tests (like blood work, vitals, and sometimes imaging) to confirm you meet the trial's criteria
• Answer every question you have
• Walk you through the informed consent document

You do not need to commit at the screening visit. Many participants take the consent form home to review before deciding.

It varies a lot. Some trials last weeks; others last years. Most trials at MedX involve:

• A screening visit (1–2 hours)
• A series of study visits over several months to a year
• A follow-up visit or phone check-in after the main study ends

The trial duration and visit schedule are always clearly laid out in your informed consent document before you enroll.

Some trials include a placebo group; many do not. Whether a study uses a placebo depends on the specific design. In trials that involve a placebo:

• You'll be told upfront that there's a chance you'll receive a placebo instead of the active treatment
• Many trials use an "active comparator" (a standard existing treatment) rather than placebo — so you receive some form of real care
• In serious illnesses, placebos are usually not given alone — they're added on top of existing standard care

Your coordinator will explain exactly how your specific trial is designed before you enroll.

After your participation ends, the research team analyzes all the data collected across every site. Trial results are usually shared with regulators and published in scientific journals.

You can ask for a summary of results at the end of the trial. In many cases, MedX will also share general findings with you directly. If the treatment shows promise, you may be eligible for extended access programs during FDA review.

No. All study-related care — visits, tests, study medication, and procedures directly required by the protocol — are provided at no cost to you.

No. You don't need insurance to participate. Your regular insurance is never billed for trial-related visits or procedures. Routine care you'd already be receiving (for other conditions) would still go through your regular insurance the way it normally does.

Compensation varies by trial. Most studies offer stipends per visit (typically $50–$250 per visit depending on length and complexity) plus reimbursement for travel, parking, and related expenses.

The exact amounts, how often you're paid, and how you're reimbursed are all written in your informed consent document before you enroll.

In the U.S., compensation over $600 per calendar year from a single source generally gets reported on a 1099 tax form and may be taxable. For smaller amounts, it often is not. We recommend asking a tax professional for your specific situation — your coordinator can provide documentation if needed.

Every trial has its own specific eligibility criteria — but broadly speaking, trials look for:

• People living with the specific condition being studied
• Healthy volunteers (for some Phase I and observational trials)
• Adults across a range of ages, ethnicities, and backgrounds
• People with and without existing health insurance

Criteria can include age range, specific test values (like blood pressure or A1C), medications you are or aren't taking, and prior treatments. The pre-screening conversation at MedX helps figure all this out quickly.

Yes. MedX provides all consent documents and study materials in both English and Spanish. Our coordinators are bilingual. Language should never be a barrier to participating in research — especially when the research is meant to help your community.

It depends on the trial. Some trials require you to stop certain medications before starting; others specifically look for people already on certain treatments. During pre-screening, your coordinator will review every medication you take and determine whether a current trial is a fit.

If a trial isn't right for you today, we'll keep your information on file (with your permission) and reach out when something that fits your situation becomes available.

No. Your regular care continues. In fact, one of the strengths of the MedX model is that your trial visits happen inside your physician's practice — you keep the same doctor, the same clinic, the same staff. They just now have an additional research option for you when one fits.

Most clinical research sites are standalone facilities you'd have to drive to. MedX is different: we embed inside the physician practices our patients already use. That means:

• You see the doctor you already trust
• No new location to navigate
• Coordinators who work alongside your regular medical team
• Bilingual, community-rooted support

We're also built to serve Houston specifically — one of the most diverse metros in America, and one of the most chronically underrepresented in clinical research. That mission shapes everything we do.

MedX is headquartered in the Katy/Cypress corridor of west Houston, Texas. Our embedded sites operate inside partner physician practices across the Greater Houston metro.

Our current therapeutic focus areas are metabolic and endocrine conditions, including:

• Type 2 Diabetes
• Obesity
• MASH / NAFLD (fatty liver disease)
• Thyroid Disorders
• Cholesterol & Lipid management
• PCOS (polycystic ovary syndrome)

We're continuously expanding. If you don't see your condition above, still get in touch — we may have options on our radar.

You can reach us by phone at +1 214 714 2565, by email at dawood@medxclinicalresearch.com, or through the form on our contact page. We respond to every inquiry.