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AEDs is perhaps justifiable and probably cost-effective, and/or screening to identify those in
need of higher vitamin D doses in keeping with the recommended 25 year ‘bone profile’.

There is insufficient evidence to justify regarding patients with epilepsy as any different from
other groups with respect to DEXA scanning and treatment, and they should thus be managed
in line with population guidance in this context. This means that for patients over 40 years,
clinicians should be asking about additional risk factors which might ‘tip the balance’ such as
prior fragility fractures, other secondary causes (of which prolonged immobility is probably
the most prevalent in the epilepsy population), and family history, noting those with other
recognised secondary causes, and where appropriate utilising the Qfracture tool to guide further
investigation and management. In terms of who should be driving this in patients with epilepsy,
national guidelines put the onus of responsibility very much in the hands of the GP to monitor
the use of medications that might be associated with falls or fracture, to ensure prescription of
calcium and vitamin D and to encourage adherence to therapy12. However, it is also known that
patients with epilepsy are less well informed on bone health issues than the general
population98, with highly variable clinical practice in this area99. It is not known whether this
reflects poor knowledge among those managing epilepsy, the higher prevalence of learning,
memory and psychosocial problems in patients with epilepsy, or that for the general physician
or indeed the specialist epileptologist managing a patient with epilepsy, bone health simply
falls down the list of priorities. However, pending additional evidence on screening, prevention
and treatment in relation to bone health in epilepsy, dependent on much needed further
research, at least for the time being, my own view is that this is an area neurologists need to
lead on, working in collaboration with GPs and local prescribing leads to better serve our
patients.

References

1. KRUSE R. Osteopathien bei antiepileptishcer Langzeittherapie. Monatsschr Kinderhelikd. 1968;116:378-381.
2. HAHN TJ, BIRGE SJ, SCHARP CR, AVIOLI AV. Phenobarbital-induced alterations in Vitamin D metabolism.

            J Clin Invest 1972;51:741-748.
3. PETTY SJ, O'BRIEN TJ, WARK JD. Anti-epileptic medication and bone health. Osteoporosis Int.

            2007;18(2):129-142.
4. VALMADRID C, VOORHEES C, LITT B, SCHNEYER CR. Practice patterns of neurologists regarding bone

            and mineral effects of antiepileptic drug therapy. Arch Neurol 2001;58(9):1369-1374.
5. FAULKNER KG. Bone matters: are density increases necessary to reduce fracture risk? J Bone Miner Res

            2000;15(2):183-187.
6. LEBOFF MS, KOHLMEIER L, HURWITZ S, FRANKLIN J, WRIGHT J, GLOWACKI J. Occult vitamin D

            deficiency in postmenopausal US women with acute hip fracture. JAMA 1999;281(16):1505-1511.
7. RIGGS BL, MELTON LJ. The worldwide problem of osteoporosis - insights afforded by epidemiology. Bone

            1995;17(5):S505-S511.
8. SHETH RD, HOBBS GR, RIGGS JE, PENNEY S. Bone mineral density in geographically diverse adolescent

            populations. Pediatrics 1996;98(5):948-951.
9. CONRAD CJ. Clinical use of bone densitometry. N Engl J Med 1991;324:1105-1109.
10. COMPSTON J. Prevention and treatment of osteoporosis - Clinical guidelines and new evidence. J Royal Coll

            Physicians Lond 2000;34(6):518-521.
11. Group RCoPC. Osteoporosis - Clinical Guidelines: Summary and Recommendations. London: Royal College

            of Physicians; 1999.
12. COMPSTON J, COOPER A, FRANCIS R, et al. Osteoporosis: Clinical Guideline for Prevention and

            Treatment. Sheffield, UK 2010 2010.
13. COMPSTON JE. Vitamin D deficiency: time for action. BMJ 1998;317(7171):1466-1467.
14. THOMAS MK, LLOYD-JONES DM, THADHANI RI, et al. Hypovitaminosis D in medical inpatients. N Engl

            J Med 1998;338(12):777-783.
15. VERROTTI A, GRECO R, LATINI T, MORGESE T, CHIARELLI F. Increased bone turnover in prepubertal,

            pubertal, and postpubertal patients receiving carbamazepine. Epilepsia 2002;43(12):1488-1492.
16. ERIKSEN EF, CHARLES P, MELSEN F, MOSEKILDE L, RISTELI L, RISTELI J. Serum markers of type-I

            collagen formation and degradation in metabolic bone disease - correlation with bone histomorphometry. J Bone
            Min Res 1993;8(2):127-132.
17. NISHIZAWA Y, NAKAMURA T, OHATA H, et al. Guidelines on the use of biochemical markers of bone
            turnover in osteoporosis (2001). J Bone Min Metab 2001;19(6):338-344.
18. HARRINGTON MG, HODKINSON HM. Anticonvulsant drugs and bone disease in the elderly. J Royal Soc
            Med 1987;80(7):425-427.
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