I Was Started on Finasteride, and in 5 Days, I Could Not Get an Erection.

After 5 days, a few patients have reported sexual side effects. When that happens, I often tell my patients to stop the medication for a few weeks until everything becomes normal again, and then retry it at one pill every 4 days for 3 weeks, and if that works, increase it to one pill every 3 days for 3 weeks. If that works, try one pill every two days, and stay on this dose, which is 80% as effective as the full dose.