Answer

Yes, generally you may drink water after completing Pratikraman, unless you have taken a specific vow or rule that restricts it.

Explanation

In Jain practice, Pratikraman is a sacred act of repentance, self-reflection, and purification. After it is completed, drinking water is not normally prohibited.

However:

• If you are doing Chauvihar, then you should not drink water after sunset.
• If you are doing Tivihar, then boiled water may be allowed according to the rule you are following.
• If you have taken a special vow, tapasya, or niyam, you should follow that vow carefully.
• If your guru, sadhu-sadhvi, or family tradition has given a specific instruction, follow that guidance.

Spiritual Understanding

The main purpose of Pratikraman is to purify the soul by asking forgiveness for mistakes and becoming more careful in conduct. Drinking water after Pratikraman is acceptable if it does not break your food/water vow or evening discipline.

Takeaway

You can drink water after Pratikraman, but not if you are observing Chauvihar or any vow that prohibits it.