A Google Ads campaign for clinical trial recruitment is not the same as a consumer campaign. The intent is different, the compliance environment is different, and the conversion action is different. Most sites that run Google Ads for recruitment set them up like general healthcare campaigns and wonder why cost-per-inquiry is $80+. The correctly structured campaign achieves $15–35 per inquiry for most common conditions. Here is the structure.
Campaign Structure: One Campaign Per Indication
Do not put multiple conditions in one campaign. Separate campaigns allow separate budgets, separate geographic targets, and separate performance monitoring. Each campaign contains two ad groups: (1) High-intent keywords (“diabetes clinical trial [city],” “type 2 diabetes research study,” “diabetes paid study near me”) and (2) Awareness keywords (“diabetes research study,” “clinical trial near me,” “medical study [city]”). Bid higher on high-intent — typically 40–60% more than awareness keywords.
Keywords: Match Types and Negatives
Use phrase match for your primary terms — not broad match. Broad match for clinical trial terms produces traffic from people searching for clinical trial software, nurse positions at research sites, and pharmaceutical stocks. Add these as negative keywords immediately: “job,” “salary,” “careers,” “nurse,” “CRA,” “CRO,” “software,” “system,” “app,” “lawsuit,” “side effects lawsuit.” Add the full negative keyword list before the campaign goes live — not after you have spent money on irrelevant clicks.
Geographic Settings: Precision Over Reach
Set your geographic target to a radius around your site — typically 25–35 miles for common conditions, 40–60 miles for specialty conditions where patients travel further. Then layer bid adjustments: add +20% bid adjustment on your top 5 ZIP codes (identified from your geographic patient map). This concentrates spend where your eligible patients are concentrated without excluding the broader area entirely.
Ad Copy: The 4-Question Framework
Each text ad must answer four questions in order: Is this for me? What will I do? Is it safe? What do I get? Headline 1: “[Condition] Clinical Trial — [City].” Headline 2: “See If You Qualify — Free Screening.” Headline 3: “Compensation Available | IRB Approved.” Description 1: “Seeking adults [age range] with [condition]. [X] study visits over [timeframe]. No cost to participate.” Description 2: “Schedule your free screening today. Results in 2 minutes.” Every word earns its place — clinical jargon in ad copy directly reduces click-through rate.
Landing Page Requirements
The landing page that receives your ad traffic needs seven elements to convert at benchmark rates (3–8% for qualified condition-specific traffic):
- H1 that matches the ad headline exactly (relevance signal for Quality Score)
- Plain-language eligibility criteria visible above the fold
- Inquiry form with 3–5 fields maximum (name, phone, email, condition confirmation, zip code)
- Compensation information stated explicitly
- IRB approval and site credentials
- Staff photo or facility photo (trust signal)
- Mobile-optimized layout (60%+ of clinical trial searches happen on mobile)
Tracking Setup (Do Not Skip This)
Install Google Ads conversion tracking on your form thank-you page before the campaign launches. Without this, you have no data on which keywords produce actual inquiries — only which produce clicks. This is the difference between a campaign you can optimize and one you are running blind. Also connect Google Search Console to your Google Ads account to see organic performance data alongside paid.
Your Campaign Launch Checklist
- Create separate campaigns per indication
- Build negative keyword list (at minimum: job, careers, CRO, software, lawsuit)
- Set geographic radius and add bid adjustments for top ZIP codes
- Write ads using the 4-question framework
- Verify landing page has all 7 required elements on mobile
- Install conversion tracking on thank-you page
- Set daily budget at 3x your target cost-per-inquiry to allow enough data