Cheers, mate. Added to the list. 
Iām having the same problem as you guys, post update i havenāt found any adrenaline. played about 3 hours yesterday coop with a friend and 3 hours today solo. Only started with 11 before the patch, down to 7 now. iām on PC
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Okie dokie. So far, from my own experience, by dropping all your adrenaline: you find the first three within 15 minutes (sometimes within 5), but then the fourth can take up to an hour, and as to how rare a fifth is I cannot say - but I didnāt get it in three hours of play.
My hypothesis, based on this and other comments by forum-goers such as @Led77vette down below, and @Zatochi over in the other thread, is that drop chance decreases with every adrenaline you have.
So, to that end, Iām gonna back up my new game, restore my old game, and check. brb. 
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O.k. So I restored my original save and realised I still had 10 adrenaline on me. 
After dropping them, I began searching, and what do you know - three within 10 minutes. Spent an hour more on it, searching every bag and toolbox I came across, but failed to find a fourth (would have spent more time, but I should have been asleep a while ago).
So while my original report:
Isnāt quite accurate, itās close enough. Iām hoping this new system is a bug, and not a āfeatureā, because people are going to get around it anyway: simply drop your stack of adrenaline, pick up three more, drop those, repeat, repeat, repeat, then when you have enough, pick them all up.
Weāll still have the same amount of adrenaline, itāll just take an extra layer of busywork to get them. 
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PC, no adrenaline shots if I continue on my save.
Deleting save and starting a new game adrenaline shots is in game but very uncommon as intended with the patch.
Yes @Vasdema go get some ( real sleep in real bed ) Because the BEDS in game are Bugged 
and are not Working as intended , << That was a joke Devās lolā¦_. Anyhow joking aside i have āāfoundāā something that was not in game before Update , donāt know if i should post this SPOILER so i will private PM you if you want to check for yourself before Disclosure to Community to see if i am wrong . I donāt want to excite peeps or be Totally wrong about what i have found , cheers
Ps4
Coop with 1 buddy
2hrs
No adrenaline found
Cheers, mate. Iāll add it.
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i wonder if decreasing the adrenaline stack size would be more effective than reducing how much it is in loots ? maybe limit to 3 ? , 20 in a stack seems op , just a thought ā¦
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Damn, thatās a simple, yet brilliant solution. Iād say 5, personally, but thatās a balance issue to be figured out over time.
Good stuff, @jakel! Go whack that into feedback before somebody steals it. 
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I had 0 shots and found three in a little over an hour. To those who donāt find any, are you carrying any in your I inventory while searching?
Its a pleasure, thanks for doing this 
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Yes, I still carry around 40 obtained b4 the update
Same for me on PC. Been playing several hours and not a single adrenaline shot drop.
This has been covered in a few other threads now.
Although you CAN stack up to 20 still, once you have 3 adrenaline shots in your inventory, you donāt find any more through looting.
The best place to build those up is in bunkers. When you enter a room / area, drop whatever adrenaline shots you have and start looting. Loot till you finish the area or have 3. If you get 3 before, just go back to your pack you dropped, drop the 3 newly acquired, and continue looting until youāre done.
Itās annoying, but at least you can still get as much as you want.
At least on my single player game, I find Uttern Bunker to be a treasure trove for both adrenaline and decent loot. I would recommend bouncing there once you start a game to stock up before heading out into the world.
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