What Can Be Done For Gas, Indigestion And Loose Stools ?

Myself and my wife are diabetic, I am obese, My doctor found that I had gained weight from last time he had seen me[ 6 months]. He got the thyroid tests done the results were for me: T3 - 1.3, T4 - 8.02 and TSH - 0.87 and for my wife it was T3 - 1.45, T 4 - 10.97 and TSH - 4.06. He has prescribed us Thyrox 50 mg for me and 25mg for my wife to be taken early morning before tea. Both of us are taking tablets for Diabetes[ I am taking Janumet 1000/50 half , volix 0.2 in the morning and Citapin xt 500 in the night & my wife takes Gluformet 1 gms in morning and half tablet in the night] and blood pressure[ I take telma 80H and my wife takes telma 40 H in the morning]. In addition he has suggested me to take Tegrital CR 200 mg half tablet in the night for the nerves . we find that the Thyroid results when compared with the normal ranges are with in suggested ranges. These tablets have created too much of gas, indigestion & loose/frequent stools. I am taking rantac 150 in the night before food and my wife is taking Rabiloc 20 in the morning before food. Can you please advice what is to be done?