// Drugs sharing the same side effects showing potential conflicts
MATCH (c1:Compound)-[:BINDS]->(:Gene),
      (c1)-[:TREATS]->(:Disease),
      (c1)-[:TREATS]->(:Disease)<-[:TREATS]-(c2:Compound),
      (c1)-[:BINDS]->(g:Gene)
WHERE c1 <> c2
RETURN c1.name AS Drug1, c2.name AS Drug2, count(g) AS SharedTargets
ORDER BY SharedTargets DESC
LIMIT 20;