Sammendrag
Background: Advanced cancer of the prostate often
causes pain that can be severe requiring palliation
with analgesics. Zoledronic acid, a third-generation
bisphosphonate, has not been primarily used as an
adjunct to treat pain in patients with metastatic bone
secondary to advanced prostate cancer in Nigeria.
The study investigated the effects of 3 doses of
Zoledronic acid, at 4-weekly intervals, in addition to
the analgesic regimen of oral morphine, diclofenac,
paracetamol and amitriptyline, on bone pain in patients
with metastatic prostate cancer .
Methods: A prospective randomized open-labelled
trial in which forty patients with moderate to severe
bone pain due to metastatic prostate cancer were
recruited after institutional ethics approval. Patients
were assigned to two groups: The Control (C) group
received liquid oral morphine, diclofenac, paracetamol
and amitriptyline. Zoledronic acid (ZG) group received
3 doses of Zoledronic acid at 4-weekly intervals in
addition to liquid morphine, diclofenac, paracetamol and
amitriptyline. Severity of pain and quality of life (QoL)
were measured at baseline and weekly for 12 weeks.
Data were analysed using means, range, standard
deviations and proportions while independent t-test was
used to compare the variables between the two groups.
Results: Demographic variables, baseline pain scores
and quality of life between the 2 groups were similar.
There was a statistically significant improvement in
pain score in the Zoledronic acid group (1.38±0.53
vs 2.13±0.94) post-intervention, (p = 0.004).
Conclusion: The administration of three doses of
Zoledronic acid at 4-weekly intervals significantly
improved bone pain score during the 12-weeks follow
up in patients with advanced prostate cancer.
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