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. 2001 Oct 6;323(7316):776. doi: 10.1136/bmj.323.7316.776

Table 3.

Side effects reported in included studies of progesterone according to method of administration

Side effect Suppository/pessary
Oral micronised
Drug Placebo Drug Placebo
Cycle length changes 40 42 5 5
Breast swelling/bloating 28 20 5 8
Change in blood loss 24 28
Nausea 19 14 2 1
Vaginal pruritus 19 13
Cramps 13 15 4 2
Headache 12  5 9 0
Flu-like symptoms  7  3
Pregnancy  6  0 1 0
Dysmenorrhoea  5  5
Depression  3  8 3 0
Dizziness/lightheadedness  3  4 24 6
Rectal pain  3  3
Anxiety  2  5
Acne  2  3 3 4
Fatigue/sedation  2  2 46 23
Insomnia  2  0 2 4
Hot flushes  1  4 0 1
Confusion/memory problems  1  3 17 1
Body hair growth  1  2
Decreased libido  1  1 0 1
Night terrors 1 1
Increased appetite 1 1
Altered taste 1 1
Dry skin 1 1
Ringing in ears 1 0
Totals 194 180 126 60