Do nutraceuticals work in erectile dysfunction? Although nutraceutical based treatments are often offered for erectile dysfunction (ED), their efficacy remains doubtful. In a recent meta analysis, the efficacy of available nutraceutical WO2006050794A1 Use of acetyl l carnitine in combination with propionyl l carnitine and sildenafil for the treatment of erectile dysfunction Google Patents Is L Carnitine Safe? Watch FIRST BEFORE Taking L Carnitine Supplements Histone deacetylase inhibitors synergize with sildenafil to suppress purine metabolism and proliferation in pulmonary hypertension ScienceDirect