Savvy Psychopharmacology

Serotonergic antidepressants’ effects on bone health

Current Psychiatry. 2021 September;20(9):45-49 | doi:10.12788/cp.0162

References

1. Fernandes BS, Hodge JM, Pasco JA, et al. Effects of depression and serotonergic antidepressants on bone: mechanisms and implications for the treatment of depression. Drugs Aging. 2016;33(1):21-25.

2. Lavoie B, Lian JB, Mawe GM. Regulation of bone metabolism by serotonin. Adv Exp Med Biol. 2017;1033:35-46.

3. Berger M, Gray JA, Roth BL. The expanded biology of serotonin. Annu Rev Med. 2009;60:355-366.

4. Hodge JM, Wang Y, Berk M, et al. Selective serotonin reuptake inhibitors inhibit human osteoclast and osteoblast formation and function. Biol Psychiatry. 2013;74(1):32-39.

5. Kumar M, Jiloha RC, Kataria D, et al. Effect of selective serotonin reuptake inhibitors on markers of bone loss. Psychiatry Res. 2019;276:39-44.

6. Agarwal S, Germosen C, Kil N, et al. Current anti-depressant use is associated with cortical bone deficits and reduced physical function in elderly women. Bone. 2020;140:115552.

7. DeBattista C. Antidepressant agents. In: Katzung BG, ed. Basic and clinical pharmacology. 14th ed. McGraw-Hill; 2018.

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19. Kendler DL, Marin F, Geusens P, et al. Psychotropic medications and proton pump inhibitors and the risk of fractures in the teriparatide versus risedronate VERO clinical trial. Bone. 2020;130:115113.

20. Dodd S, Mitchell PB, Bauer M, et al. Monitoring for antidepressant-associated adverse events in the treatment of patients with major depressive disorder: an international consensus statement. World J Biol Psychiatry. 2018;19(5):330-348.

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23. US National Library of Medicine. DailyMed. Accessed February 8, 2021. https://dailymed.nlm.nih.gov/dailymed

24. Cosman F, de Beur SJ, LeBoff MS, et al. Clinician’s guide to prevention and treatment of osteoporosis. Osteoporos Int. 2014;25(10):2359-2581.

The effect of SSRIs vs non-SSRIs on BMD also has been studied. The SSRIs were associated with significantly reduced BMD of the lumbar spine but not the total hip or femoral neck as compared to non-SSRIs; however, this BMD loss was not examined in relation to the presence of fractures. Older patients had more pronounced bone loss.¹⁵ Conversely, another meta-analysis examined BMD in women receiving SSRIs or tricyclic antidepressants.¹⁰ Neither medication class was associated with lower BMD at measured locations, including lumbar spine, femoral neck, and total hip. This analysis was limited by the lack of available trials; only 4 were included.

Other recent research has continued to explore the relationship between antidepressants and fracture in various patient populations. In a study of patients receiving maintenance dialysis treatment, short- and long-term SSRI use increased hip fracture risk. The authors speculated that short-term risk may be mediated by adverse effects that increase fall risk (eg, hyponatremia, orthostasis), whereas long-term risk may be influenced by changes in bone homeostasis.¹⁶ In two 6-month analyses of fluoxetine treatment in patients following an acute stroke, fluoxetine increased the risk of bone fractures.^17,18 Finally, in women with osteoporosis receiving risedronate or teriparatide, in both groups a higher fracture risk was observed for patients who were also receiving an SSRI or SNRI.¹⁹

Monitor BMD and educate patients about bone health

Available literature has not identified any clear risk factors for fracture with SSRI use. Guidelines suggest monitoring BMD in patients with risk factors for osteoporosis, if clinically indicated, as well as monitoring BMD in those receiving long-term antidepressant treatment.^20-22Educate patients on strategies that promote optimal bone health, such as consuming a balanced diet that meets the recommended dietary allowance of calcium, vitamin D, and limits soda consumption. Teach patients to avoid tobacco and excessive alcohol use because both adversely impact BMD. Maintaining a healthy weight, physical activity, and adequate sleep also support bone health.¹¹Instruct patients receiving antidepressants to report unexplained bone pain, tenderness, swelling, or bruising because these symptoms may be indicative of fracture.

CASE CONTINUED

Mrs. D’s age, sex, and depression place her at higher risk of fracture. Paroxetine is the only SSRI that has bone fracture listed as a precaution in its labeling.²³ In addition, it is the most anticholinergic SSRI and may have contributed to her fall. Switching to bupropion by cross titration may benefit Mrs. D because bupropion is not serotonergic. Little data exist regarding the effects of bupropion on bone. Her prescriber monitors Mrs. D’s BMD periodically, and educates her on dietary considerations. He also recommends calcium, 1,200 mg/d, and vitamin D, 800 IU/d, to help prevent fractures,²⁴ and that she continue physical therapy exercises and increase physical activity as tolerated.

Related Resources

Cosman F, de Beur SJ, LeBoff MS, et al. Clinician’s guide to prevention and treatment of osteoporosis. Osteoporos Int. 2014;25(10):2359-2581.
Dodd S, Mitchell PB, Bauer M, et al. Monitoring for antidepressant-associated adverse events in the treatment of patients with major depressive disorder: an international consensus statement. World J Biol Psychiatry. 2018;19(5):330-348.
Fernandes BS, Hodge JM, Pasco JA, et al. Effects of depression and serotonergic antidepressants on bone: mechanisms and implications for the treatment of depression. Drugs Aging. 2016;33(1):21-25.
US National Library of Medicine. DailyMed. https://dailymed.nlm.nih.gov/dailymed

Drug Brand Names

Amitriptyline • Elavil
Amlodipine • Norvasc
Aripiprazole • Abilify
Bupropion • Wellbutrin
Citalopram • Celexa
Clomipramine • Anafranil
Desipramine • Norpramin
Doxepin • Silenor, Sinequan
Duloxetine • Cymbalta
Escitalopram • Lexapro
Fluoxetine • Prozac
Fluvoxamine • Luvox
Imipramine • Tofranil
Levomilnacipran • Fetzima
Loratadine • Claritin
Mirtazapine • Remeron
Nortriptyline • Pamelor
Paroxetine • Paxil
Risedronate • Actonel
Sertraline • Zoloft
Teriparatide • Forteo
Trazodone • Desyrel
Venlafaxine • Effexor
Vortioxetine • Trintellix