Answer

Yes, you may brush your teeth before taking Navkarsi Pachchakkhan, as long as you do it carefully and avoid swallowing water or toothpaste.

For Navkarsi Pachchakkhan, you should generally take the pachchakkhan after sunrise and then eat/drink only after completing the Navkarsi time according to your local sunrise calculation.

Explanation

In Jain practice:

• Navkarsi means abstaining from food and drink until a fixed period after sunrise.
• Many Jains observe it as eating/drinking only after about 48 minutes after sunrise, depending on the local tradition and calendar.
• Pachchakkhan is a vow or renunciation, so it should be taken with awareness and sincerity.

If your Navkarsi time ends at 7:15 AM, then:

• You may brush before that, carefully.
• You should not intentionally swallow water.
• You should eat or drink only after 7:15 AM.

About Taking Pachchakkhan Before Time

It is better to take Navkarsi Pachchakkhan at the proper time as followed in your tradition. If you are unsure whether you can take it before the exact time, you should follow the guidance of your local Jain guru, upashray, or knowledgeable elder, because practices may differ slightly by tradition.

Takeaway

Brush carefully without swallowing, take Pachchakkhan respectfully according to your tradition, and eat only after the proper Navkarsi time such as 7:15 AM.