Your symptoms suggest premature ejaculation (ejaculation within about 10 seconds), and the loss of erection after ejaculation is normal, as most men enter a refractory period during which another erection is difficult for some time.
However, if you are losing the erection before ejaculation or before penetration, you may also have erectile dysfunction (ED) in addition to premature ejaculation. Both conditions are common and treatable.
Next Steps
I can't prescribe medication online without medical history, as the right treatment depends on the cause and your overall health. For a detailed evaluation and personalized treatment plan, you may consult us at 9 3 1 5 6 6 1 5 6 5.
Health Tips
Avoid smoking and excessive alcohol. Exercise regularly and maintain a healthy weight. Get adequate sleep and manage stress. Communicate openly with your partner, as anxiety often worsens premature ejaculation. The good news is that premature ejaculation is one of the most treatable sexual problems, and with the right diagnosis and treatment, most men experience significant improvement. Thank you