What Is Maximum Cremaffin Dosage That Can Be Taken By A Heart Patient?

My father aged 80 yrs has undergone angioplasty on 20.03.2014. He is taking Telma 80H,Prax 5,Tonact 20,Cardarone 200,Ecosprine 150,Pan 40 as advised by consulting Cardio. He had stomach infection 4 days back and prescribed Ciplox TZ.For last 2 days he is facing severe constipation.He has taken Cremaffin(15ml) at last night bedtime but there was no improvement in constipation.Pl advise what is max. dose of Cremaffin per day and shall he continue taking Cremaffin only for few more days for better result or any other medicine. R.K.Jha,Noida