Which drug makes your pupils larger?

heroin
cocaine
morphine
codeine
Dilated pupils typically occur as an effect of taking stimulant drugs such as cocaine and amphetamine, while opiates such as heroin, morphine and codeine constrict the pupils.
Przemek
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Very interesting!
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Answers by country

heroin
cocaine
morphine
codeine
answers
flagPakistan
7%
80%
4%
4%
42
flagRepublic of Ireland
12%
75%
0%
12%
16
flagSwitzerland
21%
71%
0%
7%
14
flagthe United Kingdom
25%
62%
8%
3%
98
flagGermany
21%
61%
5%
11%
152
flagthe Philippines
14%
57%
21%
7%
14
flagItaly
35%
57%
0%
7%
14
flagCanada
10%
55%
20%
15%
20
flagAustralia
17%
54%
14%
14%
35
flagPoland
29%
53%
9%
7%
17976
flagthe United States
19%
53%
16%
7%
194
flagEgypt
16%
50%
25%
8%
12
flagAustria
14%
47%
9%
28%
21
flagNorway
45%
45%
9%
0%
11
flagUnknown
18%
43%
12%
25%
16
flagGreece
50%
41%
0%
8%
12
flagIndia
17%
36%
33%
10%
118