Do not exceed recommended dose, especially in the elderly. Can lead to sleep & vision problems or episodes of dizziness. Use w/ care in case of HTN, CV diseases, thyroid hyperactivity, enlarged prostate, phaeochromocytoma or DM. Do not use if patient is currently taking a MAOI, or has taken a MAOI w/in the last 14 days. Do not use if taking certain anti-depressants (TCAs or tetracyclic antidepressants). Risk of rhinitis medicamentosa if used for >1 wk. Should not be used during pregnancy. Lactation.