Drop chances

ItemStage 10Stage 50Stage 100Avg count
Rotting Flesh100%100%100%4.5
Medical Journal10%10%10%0.1
Vitamins5.0%5.0%5.0%0.06
Painkillers5.0%5.0%5.0%0.06
Steroids4.3%4.3%4.3%0.05
First Aid Bandage3.6%3.6%3.6%0.04
Blood Bag3.4%3.4%3.4%0.04
Scrap Polymers3.3%3.3%3.3%0.07
Cloth Fragment3.3%3.3%3.3%0.07
Paper3.2%3.2%3.2%0.07
Bandage2.1%2.1%2.1%0.02
Recog2.1%2.1%2.1%0.02
Sewing Kit2.1%2.1%2.1%0.02
First Aid Kit2.0%2.0%2.0%0.02
Fort Bites1.9%1.9%1.9%0.02
Aloe Cream1.7%1.7%1.7%0.02
Plaster Cast1.4%1.4%1.4%0.01
Jar of Honey0.69%0.69%0.69%0.01
Splint0.67%0.67%0.67%0.01
Herbal Antibiotics0.39%0.39%0.39%0
Antibiotics0.10%0.10%0.10%0

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