Drop chances

ItemStage 10Stage 50Stage 100Avg count
Medical Journal50%50%50%0.5
Fort Bites29%29%29%0.32
First Aid Kit28%28%28%0.31
Recog28%28%28%0.31
Painkillers20%20%20%0.21
Vitamins19%19%19%0.21
Steroids16%16%16%0.17
Scrap Polymers16%16%16%0.33
Cloth Fragment16%16%16%0.33
Paper16%16%16%0.33
Blood Bag13%13%13%0.14
First Aid Bandage13%13%13%0.14
Bandage10%10%10%0.11
Sewing Kit10.0%10.0%10.0%0.1
Aloe Cream8.1%8.1%8.1%0.08
Plaster Cast5.4%5.4%5.4%0.05
Jar of Honey3.3%3.3%3.3%0.03
Splint3.1%3.1%3.1%0.03
Antibiotics1.6%1.6%1.6%0.02
Herbal Antibiotics1.3%1.3%1.3%0.01

Average count per open at loot stage 50. From 40,000 simulated opens per stage; perks that raise loot are not counted.