11
Table 4. Common Drugs Causing Constipation
Analgesics (opioids, tramadol)
Anticholinergic agents
a
Anticonvulsants (phenytoin)
Antidepressants (serotonin 5-HT
3
antagonists, tricyclics)
Antihistamines
a
Antihypertensive drugs
(particularly calcium channel antagonists, diuretics, methyldopa)
Antiparkinsonian drugs (dopaminergic agents)
Antipsychotics (phenothiazine derivatives)
Bile acid resins (cholestyramine)
Calcium channel blockers
a
Calcium supplements
a
Diuretics (furosemide, hydrochlorothiazide)
Metal ions, such as antacids (aluminum or calcium), iron supplements
Source: Rao SS. Constipation — method of investigation. In: Rakel RE (ed). Conn's Current
erapy. Philadelphia: WB Saunders, 1999:20.
a
All agents in this class.
