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Table 5 Most common FDA category D medication and category X medication prescribed

From: Prevalence of prescribing in pregnancy using the Irish primary care research network: a pilot study

Category D

No. of pregnancies exposed

Category X

No. of pregnancies exposed

Diclofenac*

19

Rosuvastatin

4

Mefenamic acid*

16

Flurazepam

3

Diazepam

15

Atorvastatin

2

Alprazolam

11

Temazepam

2

Prednisolone*

10

Misoprostol

2

Betamethasone*

10

Diclofenac/Misoprostol

1

  1. Note: each medication is only counted once per pregnancy in cases of repeat prescriptions or multiple prescriptions issued during the same pregnancy.
  2. *Diclofenac is classified as Category B in 1st and 2nd trimester and Category D in 3rd trimester. Mefenamic acid is classified as Category C in 1st and 2nd trimester and Category D in 3rd trimester. Prednisolone and betamethasone are classified as Category C in 2nd and 3rd trimester and Category D in 1st trimester.