Final answer:
Medications like calcium supplements, certain antihypertensives, and antidepressants, notably SSRIs, can contribute to constipation by affecting bowel movements and gut muscle relaxation.
Step-by-step explanation:
Medications that may contribute to constipation include: calcium supplements, some antihypertensives (such as calcium channel blockers), and certain antidepressants. Antidepressant medications, particularly classes that include selective serotonin reuptake inhibitors (SSRIs), can slow bowel movements, leading to constipation. Similarly, blood pressure medications such as calcium channel blockers can relax the muscles in the gut, which might result in decreased bowel motility.