I've been taking folic acid for over 3.5 years to combat hair loss caused by Imuran. Some time ago I wrote a a post about hair loss and CD meds. Here is the portion I wrote on Pentasa:
Mesalamine [Pentasa, Asacol] can also cause hair loss. Unfortunately some physicians are not as compassionate in recognizing that excessive hair loss can be quite traumatic to the sufferer. Hair loss from mesalamine can sometimes be controlled or minimized by dosage change. If you suspect that your doctor is going to say that hair loss is NOT due to the mesalamine and you suspect it is, the following study can be printed out to take to your appointment.
Diffuse alopecia as side effect of mesalazine therapy in Crohn's disease
Hi I've been on lialda for about a year now and i haven't really noticed a significant amount of hair loss but i have noticed some recently, nothing to be concerned about....but it could be stress.