Table 1 -- Medications Commonly Associated with Constipation

Anticholinergics: Antihistamines, tricyclic antidepressants, phenothiazone derivative, antipsychotics, and antimuscarinic drugs for Parkinson's

Antihypertensives: alpha-blockers, Beta-blockers, calcium channel blockers

Antacids: calcium or aluminum containing antacids

Analgesics: Opiates

Supplements: Calcium, Iron

Table 2 -- Constipation Associated with Systemic Disease

Endocrine and metabolic:

Hypercalcemia
Hypokalemia
Diabetes mellitus
Hypothyroidism

Neuromuscular Diseases:

Progressive Systemic Sclerosis
Muscular Dystrophy
Hirschsprung's disease
Chagas' Disease (Trypanosoma cruzi)
Autonomic Neuropathy

Central Nervous System Disorders:

Dementia
Parkinson's Disease
Multiple Sclerosis
Spinal Cord Lesions
Cerebrovascular Accidents

Table 3 -- Laxatives:

Stool Softeners

Mineral Oil
Docusate Sodium

Unabsorbed Sugars:

Lactulose
Sorbitol
Lacitol

Bulk Laxatives:

Psyllium
Methylcellulose
Carboxymethycellulose
Wheat Fiber

Salts:

Magnesium Sulfate
Magnesium Citrate

Hyperosmolar Laxatives:

Polyethylene glycol

Irritant Laxatives:

Bisacodyl
Senna
Cascara
Aloe
Castor Oil