Please give me the wording for a saddhaporshi fast that allows water for medication

You can use this simple wording for a Saddhāporshi / Sādhāporasi fast with an allowance for medicine:

“Aaj meṅ Sādhāporasi kā upvās rakhtā / rakhtī hūṅ. Mātra āushadhi (medicine) ke liye jal lene ki anumati rahegi.”

If you want a more formal Jain-style vow, you can say:

“Main Sādhāporasi vrat svīkār kartā / kartī hūṅ. Is vrat mein bhojan ka tyāg rahega, aur keval āushadhi ke liye jal grahaṇ karne ki anumati rahegi.”

A very short version is:

“Sādhāporasi vrat with medicine-water only.”

In Jain practice, if possible, this should be taken with samyak bhāva, and the wording can be adjusted by your guru or sādhu-sādhvī according to your tradition.