1. Bulk forming agents
Dietary fibre:
Bran
Psyllium (Plantago)
Ispaghula
Methylcellulose
2. Stool softener
Docusates (DOSS)
Liquid paraffin
3. Stimulant purgatives
a. Diphenylmethanes:
Phenolphthalein
Bisacodyl
Sodium picosulfate
b. Anthraquinones (Emodins):
Senna
Cascara sagrada
c. 5-HT4 agonist:
Tegaserod
d. Fixed oil:
Castor oil
4. Osmotic purgatives
Magnesium sulphate
Magnesium hydroxide
Sodium sulphate
Sodium phosphate
Sod. pot. Tartrate
Lactulose