Is 2,2-Diphenyl-4-(4-carbethoxy-4-phenylpiperidino)butyronitrile Safe in Breastfeeding

I am a breastfeeding mother and i want to know if it is safe to use 2,2-Diphenyl-4-(4-carbethoxy-4-phenylpiperidino)butyronitrile? Is 2,2-Diphenyl-4-(4-carbethoxy-4-phenylpiperidino)butyronitrile safe for nursing mother and child? Does 2,2-Diphenyl-4-(4-carbethoxy-4-phenylpiperidino)butyronitrile extracts into breast milk? Does 2,2-Diphenyl-4-(4-carbethoxy-4-phenylpiperidino)butyronitrile has any long term or short term side effects on infants? Can 2,2-Diphenyl-4-(4-carbethoxy-4-phenylpiperidino)butyronitrile influence milk supply or can 2,2-Diphenyl-4-(4-carbethoxy-4-phenylpiperidino)butyronitrile decrease milk supply in lactating mothers?

No data exist on the use of 2,2-Diphenyl-4-(4-carbethoxy-4-phenylpiperidino)butyronitrile during breastfeeding. One expert panel considers 2,2-Diphenyl-4-(4-carbethoxy-4-phenylpiperidino)butyronitrile to be unacceptable during breastfeeding.[1] Based on its chemical and pharmacological similarity to narcotics, occasional small doses of 2,2-Diphenyl-4-(4-carbethoxy-4-phenylpiperidino)butyronitrile may be acceptable while breastfeeding an older infant, but alternatives are preferred, especially while nursing a newborn.