Answer

If you have taken Tivihar Upvas Pachkan and then decide that you will not drink water also, you should take Chauvihar Upvas Pachkan.

Explanation

In Jain practice:

• Tivihar Upvas means fasting without food, but water is allowed according to the pachkan rules.
• Chauvihar Upvas means fasting without food and without water.

So, if after taking Tivihar Pachkan you decide to give up water too, you should respectfully take the Chauvihar Pachkan from your Guru Bhagwant, Sadhvi ji, or according to your tradition’s proper pachkan method.

Spiritual Understanding

Pachkan is a sacred vow. It should be taken with clarity and sincerity. If your intention becomes stricter, moving from Tivihar to Chauvihar is spiritually acceptable when done properly.

Takeaway

You need to take Chauvihar Upvas Pachkan if you do not want to drink water also.