Hello, Do continue to take tadalafil, you have to take it at least two hours before having sex, PDE5 inhibitors help blood flow into the penis. Get clinically examined by a Urologist, along with tadalafil you will have to get done testosterone therapy for normal erection. ou are advised to penetrate when your wife is optimum wet, it will be helpful. Excessive lubrication is also not good. You can make the use of vacuum erection devices. Your treating doctor may suggest you self injection therapy with alprostadil shot, it is very helpful. Also maintain healthy weight, obesity interferes with erection. Deposition of fat layer in the penis causes inadequate blood circulation, hence affecting erection. Do pelvic floor exercises, aerobic exercises, Kegel exercises, pause and squeeze technique for stronger erection and for longer prolonged erection. You should get a stronger erection with all the said exercises, medicine & therapy. If not, then your treating doctor may recommend treatment with implant by surgery. Avoid watching pornography or any similar stuff that triggers you visually. Visual seduction affects your performance with your partner. It may cause PE or ED. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Nupur K, General & Family Physician