Answer
For the Thornton & Ross Ltd Calamine Lotion BP product (calamine + zinc oxide), no evidence establishing safety during pregnancy or breastfeeding has been found, although it has been used for many years without apparent ill effects.
Sources for this answer
- Calamine Lotion BPThornton & Ross Ltd · emc · SmPC §4.6 Fertility, pregnancy and lactation · Version 4Document updated
Sources checked