Tricyclic anti depressants are a tough one because different people have such very different reactions to them. i.e i'm on nortrytiline, it should slow my heart but it causes it to race. Has had no effect on my blood pressure though. But yes, it is possible. Why? Do you feel that your blood pressure is low?
Most doctors will tell you it will slow everything, make you tired. Slow blood pressure. But as i said, this drug is a strange one, it reacts with the body very randomly per person.