Megalis 10 mg will help you with erections. It is used in Erectile dysfunction problem and not for improving ejaculation. Premature ejaculation problem is cured with different medications. The management also consist of correcting underlying causes like stress and anxiety. Additionally, you can also learn about controlling the ejaculation while intercourse.
Next Steps
I would suggest you to consult with a sexologist. For more information regarding this problem you can ask a detailed query here on practo.
Health Tips
It is treatable.