Hmm ok sounds good... how about as follows...
First Aid, Prerequisite: Proficiency with Wisdom (Medicine). You are good at patching up your allies in the middle of a fight. This feat allows a character to use their Action to attempt a Wisdom (Medicine) check on behalf of an adjacent creature afflicted with the Reeling or Stunned Conditions. If the check meets or exceeds the DC of the original affect, one of the conditions is removed. If the check exceeds the DC by 5, both conditions are removed (if the creatures is suffering from both). This feat adds two additional capabilities to the medical kit, costing one unit of supplies per application for the first capability. First a character with this feat may use an Action and immediately heal 1d6+4 HPs, plus an additional number of HPs equal to the treated creature's Hit Dice maximum plus the healer's Intelligence or Wisdom modifier (healer's choice). A creature may only benefit from this use once before taking a short or long rest. Second, while using a Medical Kit to stabilize an incapacitated creature, if the check results is 20+, not only is the creature restored to 1 HP and no longer incapacitated, that creature is also healed by the amount listed above.
First Aid, Prerequisite: Proficiency with Wisdom (Medicine). You are good at patching up your allies in the middle of a fight. This feat allows a character to use their Action to attempt a Wisdom (Medicine) check on behalf of an adjacent creature afflicted with the Reeling or Stunned Conditions. If the check meets or exceeds the DC of the original affect, one of the conditions is removed. If the check exceeds the DC by 5, both conditions are removed (if the creatures is suffering from both). This feat adds two additional capabilities to the medical kit, costing one unit of supplies per application for the first capability. First a character with this feat may use an Action and immediately heal 1d6+4 HPs, plus an additional number of HPs equal to the treated creature's Hit Dice maximum plus the healer's Intelligence or Wisdom modifier (healer's choice). A creature may only benefit from this use once before taking a short or long rest. Second, while using a Medical Kit to stabilize an incapacitated creature, if the check results is 20+, not only is the creature restored to 1 HP and no longer incapacitated, that creature is also healed by the amount listed above.