Do calcium channel blockers increase the risk of cancer?
Calcium channel blockers can block calcium signals that trigger cell differentiation and apoptosis, which are important mechanisms of cancer growth regulation. To ascertain whether calcium channel blocker use was associated with an increased risk of cancer, 750 hypertensive persons age > or = 71 years, with no history of cancer at baseline, were followed from 1988 through 1992. The patients were using either beta-blockers, angiotensin converting enzyme inhibitors or calcium channel blockers (verapamil, nifedipine, and diltiazem; mainly of the short-acting variety). Compared to beta-blockers (n = 424, 28 events), after adjusting for age, gender, race, smoking, body mass index, and number of hospital admissions not related with cancer, the relative risks of cancer (95% confidence interval) for angiotensin converting enzyme inhibitors (n = 124, 6 events) and calcium channel blockers (n = 202, 27 events) were 0.73 (0.30 to 1.78) and 2.02 (1.16 to 3.54), respectively. These findings indicate that calcium channel blocker therapy might increase the risk of cancer. New data are needed in patients using modern calcium channel blocker agents with more gradual absorption. This report should encourage further study of cancer outcomes in elderly patients who are vulnerable to cancer and who are receiving calcium channel blockers.
Pahor
M
M
Department of Internal Medicine and Geriatrics, Catholic University, Rome, Italy.
Guralnik
J M
JM
Salive
M E
ME
Corti
M C
MC
Carbonin
P
P
Havlik
R J
RJ
D000319:Adrenergic beta-Antagonists / Q000009:adverse effects / Q000627:therapeutic use; D000368:Aged; D000369:Aged, 80 and over; D000806:Angiotensin-Converting Enzyme Inhibitors / Q000009:adverse effects / Q000627:therapeutic use; D000959:Antihypertensive Agents / Q000009:adverse effects* / Q000627:therapeutic use; D002121:Calcium Channel Blockers / Q000009:adverse effects* / Q000627:therapeutic use; D005260:Female; D006801:Humans; D008297:Male; D015999:Multivariate Analysis; D009369:Neoplasms / Q000139:chemically induced* / Q000453:epidemiology*; D018570:Risk Assessment; D012307:Risk Factors
D000319:Adrenergic beta-Antagonists; D000806:Angiotensin-Converting Enzyme Inhibitors; D000959:Antihypertensive Agents; D002121:Calcium Channel Blockers