I'm Checking To See If There Are Any "common" Side

I'm checking to see if there are any "common" side effects of the following medicines that would cause back pain, BMS which is horrible. I am taking the following medications (prescriptions & natural supplements). I also have severe stomach issues.
Diazepam: 10 mg x 3 daily
Venlafaxine: 300 mg x 2 daily
Folic Acid Rx @ bedtime
Nexium: 40 mg x 2 daily
Super Dophilus: 60 mg 1 x daily
Atri-acidic: All natural (2 pills each meal)... 6 a day
Super Magnesium: 1 daily at night
Kios DS: 640 mg
Anastrozole: 1 mg. daily
Clonidine Patch: 1 patch for 7 days
Atorvastatin: 40 mg a day
Sumatriptan: 50/100 mg as needed for migraines
Vitamin D2000: I'm Vitamin D deficient
Vitamin B Complex w/ C: 2 x daily
Alpha Lipoic Acid: 600 mg daily (3 times a day) for BMS
P-5-P (Enteric Coated Most Active Form of B-6): 50 Mg 1 x day for BMS
Lecithen: 2 Pills with each meal (3 x daily) 1,200 mg each

Can you help?