SERMO Drug Ratings: How Doctors’ Peer Reviews Shape Prescribing 

Doctors increasingly turn to each other, not to pharma, for an honest view of a medicine. SERMO drug ratings – doctors rating medications for other doctors, often nicknamed ‘Yelp for drugs’ – show how strongly peer opinion now shapes the way doctors see and prescribe treatments. 

Key takeaways 

• SERMO’s Drug Ratings Directory holds over 1.2 million physician-submitted ratings. 

• In SERMO’s surveys, 73% of physicians found peer reviews more credible than pharma information. 

• In Japan, M3’s m3.com is both a peer community and a commercial channel. 

What Are SERMO Drug Ratings? 

SERMO drug ratings are physician-submitted reviews of medications, shared on SERMO’s physician-only social network. The Drug Ratings Directory, launched in 2017, holds over 1.2 million ratings across safety, efficacy, tolerability, accessibility and adherence. 

SERMO was founded in 2005 by Dr Daniel Palestrant, in the wake of the 2004 Vioxx recall, as a place where doctors could discuss cases away from pharma influence. It now has over 1.3 million healthcare professional members in more than 150 countries, and offers honoraria to doctors who complete surveys. 

Do SERMO Drug Ratings Change Doctors’ Minds? 

According to SERMO’s own research, yes. In a survey of more than 2,000 physicians across 15 countries, 73% found peer reviews more credible than information from pharma, and 57% had already changed their perception of a drug because of peer ratings, and 84% believed peer ratings would help improve patient outcomes¹. A later survey found 41% of US physicians said social media had changed what they prescribed, with SERMO named the most influential closed physician platform². The limitation: these are self-reported survey results, not measured prescribing behaviour. 

Why Do Doctors Trust Peers More Than Pharma? 

Peer networks let doctors see how they stack up against colleagues – shifting influence from traditional ‘messengers’ such as key opinion leaders and medical reps to the average doctor. The same ‘herd’ effect shows up beyond medicine, as we explored in Follow the Herd. 

Peer networks don’t simply replace pharma’s influence – they interact with it. When a physician received payments from a drug manufacturer, their peers’ prescribing of that drug rose by roughly a further 25%³. Peer influence can amplify a pharma message as well as challenge one. 

Do Physician Networks Work the Same Way in Asia-Pacific? 

Yes – SERMO isn’t the only large-scale example of this shift; Japan’s M3 shows the same pattern in Asia-Pacific. 

• Context: M3, Inc., founded in Tokyo in 2000. 

• Platform: m3.com has over 340,000 registered doctors in Japan and more than 6.5 million verified physicians worldwide⁴. 

• Commercial use: alongside peer discussion, M3 runs digital detailing, medical education and clinical-trial recruitment. 

• Lesson for practice: the same platform can be both a peer community and a commercial channel. 

Want to know what doctors in your market really think of your treatment? DeltaMV’s Healthcare Market Research team can help. 

How Can Healthcare Marketers Use Physician Peer Ratings? 4 Steps 

1. Listen to unprompted peer sentiment – a different signal from a survey or advisory board. 

2. Compare your treatment on safety, efficacy, tolerability, accessibility and adherence. 

3. Ask why doctors say what they say, and turn it into positioning and field-team decisions. 

4. Build a multi-faceted strategy – see why human insight is key to pharma omnichannel success and why it’s time to consider more than just detailing. 

What Are the Limitations of Physician Ratings Data? 

• Self-reported evidence: the headline figures come from SERMO’s own surveys. 

• Influence cuts both ways: peer networks can amplify a pharma message as well as challenge it³. 

• Not built for marketers: SERMO was designed as a space away from pharma influence. 

Frequently Asked Questions 

What is SERMO? 

A physician-only social network founded in 2005, with over 1.3 million healthcare professional members. 

Do drug ratings change what doctors prescribe? 

According to SERMO’s research, often yes: 41% of US physicians said information on social media had changed what they prescribed². 

Is there a SERMO equivalent in Asia-Pacific? 

Yes. In Japan, M3’s m3.com has over 340,000 registered doctors. 

Next Steps: Turn Peer Sentiment Into Market Intelligence 

The popularity of SERMO highlights the importance of a multi-faceted strategy across communication touchpoints. DeltaMV’s Healthcare Market Research practice helps you understand not just what doctors are saying on platforms like SERMO or m3.com, but why – and what that means for your next launch. 

Want to understand what doctors are really telling each other about your treatment area? Get in touch with DeltaMV’s Healthcare Market Research team. 

References 

1. Sermo. (2017, October 26). Physicians say peer reviews will change drug perceptions [Press release]. https://sermo.com/media/press-releases-view/97 

2. Sermo & LiveWorld. (2023, February 15). Survey finds 57% of U.S. physicians have changed their perception of a medication as a result of info on social media [Press release]. Business Wire. https://www.businesswire.com/news/home/20230215005061/en/Survey-Finds-57-of-U.S.-Physicians-Have-Changed-Their-Perception-of-a-Medication-as-a-Result-of-Info-on-Social-Media 

3. Agha, L., & Zeltzer, D. (2022). Drug diffusion through peer networks: The influence of industry payments. American Economic Journal: Economic Policy, 14(2), 1–33. https://doi.org/10.1257/pol.20200044 

4. M3, Inc. (2026). Corporate information. Retrieved October 19, 2026, from https://corporate.m3.com/en/corporate/