Ulcerative Colitis -- Maintenance - Can Azulfidine and Azothiaprine be used together as combination?

This is from Family Practice Notebook
See: http://www.fpnotebook.com/GI/IBD/UlcrtvClts.htm

"Management: Mild to Moderate disease
Agents: 5-Aminosalicylic Acid Derivatives (5-ASA agents)
No Sulfa Allergy
Sulfasalazine (Azulfidine)
Sulfa Allergy
Mesalamine (Asacol, Pentasa)
Olsalazine (Dipentum) 500 mg PO bid
Balsalazide
Duration of medication use: 6-12 weeks
Taper preparations to prevent rebound
Route
Rectal suppositories are preferred for proctitis
Use oral and rectal agents together for pancolitis

Expand this post...

Management: Moderate to Severe disease
Corticosteroids: Oral
Agents
Prednisone 40-60 mg/day orally
Methylprednisolone (Medrol) 35-40 mg/day orally
Hydrocortisone (Cortef) 200-300 mg/day orally
Methylprednisolone (Solu-Medrol) 40 mg IV daily
Taper Corticosteroids gradually to prevent rebound
Continue starting dose until clinical response (typically 10-14 days)
After response, reduce dose by 5mg per week
Efficacy
Systemic Corticosteroids do not maintain remission and have serious side effects
Corticosteroids: Rectal (for distal Ulcerative Colitis)
Hydrocortisone Enema (Cortenema) 100 mg qd to bid
Hydrocortisone Acetate rectal foam (Cortifoam)
Disposition
Hospitalization required when cases refractory to oral steroids
Cyclosporine (Sandimmune) is used in acute cases refractory to IV Corticosteroids

Management: Immunosuppressants for Refractory disease
Agents
Infliximab (Remicade)
Azathioprine (Imuran) 50-100 mg/day
6-Mercaptopurine (Purinethol)
Indications:
Poor control with Corticosteroids
Serious Corticosteroid complications
Steroid dependent to control symptoms
Duration
For long term therapy only
Ineffective for acute dx
Onset of action: 2-6 months"

I am unsure whether they can be taken together. From the above link they are not given together. Probably best to check with your specialist.