Problems with digestion due to medication

Did you know that certain medication can have a negative effect on your digestion? These are: antibiotics, pain killers (mainly codein), psychopharmaca (antidepressants, tranquilizers), medication for high blood pressure, diuretica ("water tablets"), iron- and calcium tablets, as well as laxatives (also seemingly "harm...less" ones like aloe, senna and buckthorn).