It’s relatively safe to take Phenergan Elixir 5mg/5ml Oral Solution 100ml when you’re pregnant, but only for very short periods. Talk to your doctor before taking this medicine if you are pregnant, might become pregnant, or think you may be pregnant. Phenergan Elixir 5mg/5ml Oral Solution 100ml shouldn't be taken 2 weeks before birth. You also shouldn't take Phenergan Elixir 5mg/5ml Oral Solution 100ml if you are breastfeeding as small amounts may pass into your milk, which can be harmful to your baby. Speak to our pharmacist or your GP for expert advice before taking this medicine when you’re pregnant.