Single Dex+ Pen Injection turned into 30u Dex+ Inside A Marine

## Testmerges
#10999: 'Fix of various plane related issues' by Blundir at commit f85a7153c4
#11724: 'Point Blank Refactor [EXPERIMENTAL]' by TrollerNoob at commit 466ad883dc
#11680: 'Don't qdel tgui windows' by Drulikar at commit 0499627b55
#11368: 'FTL Hijack Evacuation' by Drulikar at commit 75c4efe419
#11555: 'Adds tethering to some storage items' by Nihisohel at commit 17401339ec
#8991: 'Medical Rework Phase 1 - Chemical Changes' by Nihisohel at commit bac301533e

## Round ID
32709

## Description of the bug
Noticed a marine could use some dex+ so injected them with a dex+ pen(1u injection), I heard a bubbling sound but can not confirm if it was from the marine I injected or not as the evacuation was ongoing on Alamo. When I scanned the marine I had injected a 2nd time, the marine had exactly 30u Dex+ in their system with no other chemical amounts changed.

## What's the difference with what should have happened?
Dex+ injectors should not insta kill people and reactions inside the body should not occur.

## How do we reproduce this bug?
I have not been able to replicate the bug on myself.
I suspect a chemical reaction occurred in the patients body but I can not determine if it had something to do with the medical reworked chem system or maybe even research. The patient had almost 9u iron in them with bicard, kelo, and tram when I injected the dex+.

## Attached logs
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## Additional details
- Author: Superwelder
- Admin: the mistchristmas
- Note: Ruled out spamming precise mode with the injector x10 it didn't transfer chems it didn't have.

Start by reviewing the medical reworked chem system and research interactions, using round 32709 and testmerge #8991 as the reported context. Reproduce the Dex+ pen injection with the listed chemicals, identify why 1u becomes 30u, and confirm that injections do not trigger unintended reactions or lethal effects.

Written by the indexing model from the issue text.