Why Lantheus Shares Falter Amid Rising R&D Costs and Market CompetitionInvestors spot Lantheus’s slide: below its 200‑day SMA, high P/E, rising R&D costs and stiff competition risk a continued undervaluation.LANTHEUS HOLDINGS INCUnited States Health Care Health Care Equipment & Services AI generated Vanessa Liu 23/10/2026, 13:51 3 minutes to read