Brief Answer:
It is normal thing

Detailed Answer:
Hi
Welcome
I have gone through your query
Semen is produced and stored in seminal vesicles. This semen in general is expelled by masturbation or sex. When someone does not actively expel semen through masturbation or sex, there is excess semen in seminal vesicles.

This excess stored semen comes out during sleep, urination or defecation.

In sleep during dreams or excitement with slight force excess semen comes out and it is known as night fall.

If you are not doing masturbation regularly or not involved in sexual activities, night fall would be there. It is absolutely normal phenomenon and not a illness.
Hope this helps
Take care

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Brief Answer:
I would not have recommended medicines

Detailed Answer:
Hi
Welcome.

In some cases, medicines used to address premature ejaculation can be tried. However the benefits of such drugs are fewer than side effects experienced. Therefore I wouldn't suggest you to take any medicines. Either regular sex or masturbation should be helpful.

Hope this helps
Take care

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