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. 2025 Sep 12;9:e81912. doi: 10.2196/81912

Table 5.

Percentage of cohort participants reporting side effects by molecule by survey month.

Side effect Month 1, n (%) Month 3, n (%) Month 6, n (%) Month 12, n (%)

Tirzepatide cohort (n=209) Semaglutide cohort (n=130) Tirzepatide cohort (n=209) Semaglutide cohort (n=130) Tirzepatide cohort (n=209) Semaglutide cohort (n=130) Tirzepatide cohort (n=209) Semaglutide cohort (n=130)
Constipation 61 (29.2) 41 (31.5) 45 (21.5) 40 (30.8) 42 (20.1) 23 (17.7) 27 (12.9)a 20 (15.4)
Diarrhea 18 (8.6) 13 (10) 20 (9.6) 14 (10.8) 26 (12.4) 7 (5.4) 13 (6.2) 7 (5.4)
Feeling anxious 5 (2.4) 2 (1.5) 4 (1.9) 1 (0.8) 1 (0.5) 3 (2.3) 4 (1.9) 1 (0.8)
Feeling dizzy 12 (5.7) 6 (4.6) 7 (3.3) 5 (3.8) 2 (1) 2 (1.5) 6 (2.9) 5 (3.8)
Feeling more tired than usual 45 (21.5) 32 (24.6) 42 (20.1) 26 (20) 29 (13.9) 23 (17.7) 17 (8.1)b 4 (3.1)b
Feeling sick 58 (27.8) 41 (31.5) 59 (28.2) 46 (35.4) 42 (20.1) 14 (10.8)b 22 (10.5)b 4 (3.1)b
Hair loss 3 (1.4) 2 (1.5) 6 (2.9) 1 (0.8) 22 (10.5)b 4 (3.1) 20 (9.6)b 7 (5.4)
Headaches 16 (7.7) 20 (15.4) 9 (4.3) 18 (13.8) 5 (2.4) 3 (2.3)b 5 (2.4) 3 (2.3)b
Heartburn or indigestion 37 (17.7) 11 (8.5) 37 (17.7) 27 (20.8) 21 (10) 11 (8.5) 10 (4.8)b 7 (5.4)
No side effects 87 (41.6) 70 (53.8) 82 (39.2) 41 (31.5)b 92 (44) 70 (53.8) 126 (60.3)b 88 (67.7)
None of the above 4 (1.9) 3 (2.3) 4 (1.9) 1 (0.8) 4 (1.9) 3 (2.3) 5 (2.4) 2 (1.5)
Reactions in the injection site 10 (4.8) 2 (1.5) 12 (5.7) 0 (0) 25 (12) 1 (0.8) 11 (5.3) 2 (1.5)
Severe stomach pain 0 (0) 1 (0.8) 0 (0) 1 (0.8) 1 (0.5) 1 (0.8) 0 (0) 1 (0.8)
Tender or swollen stomach 2 (1) 1 (0.8) 1 (0.5) 2 (1.5) 2 (1) 1 (0.8) 0 (0) 0 (0)
Vomiting 5 (2.4) 2 (1.5) 10 (4.8) 7 (5.4) 6 (2.9) 3 (2.3) 5 (2.4) 1 (0.8)

aP=.002.

bP<.001.