In a systematic NLP analysis of 1,168 Reddit posts about 4 PrEP therapies from 2011-2025, side effects were the leading discussion topic in 1,076 posts, with weight change mentioned most often. The study also found that 96.7% of posts were questions and that drug interactions were the most common information gap, identified in 26.5% of posts.

Why It Matters To Your Practice

• Patients considering or using PrEP are turning to anonymous online forums for answers about tolerability, switching, safety and access.

• What patients ask online may surface concerns they do not raise in clinic, especially around side effects, stigma-sensitive questions and long-term risks.

• Reddit discussions shifted over time from basic access and effectiveness to injectable options and longer-term safety, suggesting counseling needs are changing.

Clinical Implications

• Proactive counseling on side effects may be no longer enough without specific discussion of weight change, drug interactions and switching between PrEP options.

• When starting or reviewing PrEP, clinicians should anticipate questions about Truvada, Descovy, Apretude and newer agents, including comparative safety and practical tradeoffs.

• Medication reconciliation and interaction review deserve emphasis, given that drug interactions accounted for the largest identified information gap.

• Privacy-preserving AI tools could extend evidence-based education between visits if they are anchored to trusted sources and local guidance.

Insights

• The dataset included posts mentioning Truvada, Descovy, Apretude and Yeztugo by brand or generic name.

• Seven distinct themes emerged across PrEP discussions, with side effects the most frequent primary topic.

• Truvada was the most frequently discussed medication.

• The authors propose using these findings to inform a privacy-preserving PrEP chatbot trained on authoritative UK sources, including hiv-druginteractions.org, BHIVA guidelines and NHS resources.

The Bottom Line

• For clinicians, the signal is clear: PrEP users want more precise, practical guidance on adverse effects, interactions and switching than they may currently be getting.

• AI may help practice not by replacing counseling, but by scaling trustworthy, private, always-available answers to the questions patients are already asking online.

Reference: Understanding community questions about HIV pre-exposure prophylaxis (PrEP): A thematic analysis of reddit threads to inform development of an AI chatbot for PrEP education