HERBESSER and HERBESSER 60 are contraindicated in pregnant women or women who may possibly be pregnant. [Animal studies have shown that the drug has teratogenic effects (mice: skeletal abnormalities, dysplasias) and embryotoxicity (mice, rats: death)
It is advisable to avoid using the drug in lactating mothers. If use of the drugs is judged to be essential, breast feeding should be discontinued during treatment. [It has been reported that diltiazem hydrochloride is excreted in breast milk.]