Hello, I have gone through your query and understood the concern. Nortryptiline has not been assigned any category by the FDA while it is a category C drug with AU TGA, which means the drug may cause harmful effects on the fetus without causing malformations. Neonatal withdrawal symptoms and anti-cholinergic symptoms may occur when used near term. Labile hypertension may also be associated with the use of this medication and regular monitoring is mandatory with its use. If you have switched over the medication yourself, please contact a specialist immediately for proper guidance. Hope this helps.