Is dorzolamide/timolol safe for women who are pregnant or breastfeeding?

Not safe. It is category c meaning that animal studies have shown adverse effects on fetuses, but no human studies have been done. Even less is known about it's effect on lactation. Avoid it during pregnancy and breast-feeding if possible.
No. The answer is not a clear cut yes/no. The fda has assigned a category c rating which means there were some negative effects when given to animals at extremely high doses but no clear answer in humans. You should talk to your ob, eye doctor and pediatrician.

Related Questions

Is dorzolamide safe for women who are pregnant or breastfeeding?

Yes. Dorzolamide (trusopt) is an eye drop used to treat glaucoma. Although there are no studies to support its safety in pregnancy, trusopt would be a reasonable choice. You can find more information about this subject on the glaucoma research foundation website: http://www.Glaucoma.Org/treatment/glaucoma-and-pregnancy-1.Php. Read more...
Unknown. There are no available studies to indicate safety or lack of safety with these conditions. Read more...