Here is a link that discusses strong medication.
Here is what is narrated about putting ones hand on the site of the pain when supplicating (so that Allah removes it, if he wills):
Allah's Messenger (ﷺ) said: "Place your hand at the place where you feel pain in your body and say: 'In the name of Allah' (Bismillah) three times, and seven times 'I seek refuge with Allah and with His Power from the evil that I find and that I fear' (A'udhu bil-lahi wa qudratihi min sharri ma a-jidu wa u-hadhir)
Muslim (2022); in Ibn Majah (3522):
"Put your right hand on it and say: In the Name of Allah, I seek refuge in the might and power of Allah from the evil of what I feel and what I fear (Bismillah, a'udhu bi-i'z-zatil-lahi wa qudratihi min sharri ma a-jidu wa u-hadhir) 7 times." U'thman bin abi al-A's ath-Thaqafi said: 'I said that, and Allah healed me.'
In At-Tirmidhi (2080), which Abu I'sa classed Hasan Sahih, it is narrated:
"Rub (or wipe) [the place] with your right hand 7 times and say: I seek refuge in Allah's might, power, and authority, from the evil of what I find (A'udhu bi-i'z-zatil-lahi wa qudratihi wa Sultanihi min sharri ma a-jid)
Lastly, in Al-Mustadrak (4/244), which Al-Hakim classed Sahih and Imam Dhahabi agreed upon, it is narrated to say firstly once:
"In the Name of Allah, I seek refuge in Allah's might and power from the evil of this pain I feel" (Bismillah, a'udhu bi-i'z-zatil-lahi wa qudratihi min sharri ma a-jidu min waja'i hadha), then lift your hand and repeat that an odd number of times."