Anti- histamine/ anti allergy medicines

 I  have been reading online to try figure out if someone with POAG can take anti histamines such as Claratin and ephedrines. From what I can read it appears as if these anti- allergic medicines are mostly a problem for narrow angle Glaucoma - related to the dialating effect - but seems ok for open angle Glaucoma. maybe someone has a bit more info or experience - I will ask my dr the next time I see him.

Daniel