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Updated: Jul 5, 2026

Quantification of the Immunosuppressant Tacrolimus on Dried Blood Spots Using LC-MS/MS
Published on: November 8, 2015
Clinical implications of addiction related immunosuppression
1Southcity Family Medical Centre, 39 Gladstone Road, Highgate Hill, Brisbane, Queensland, 4101, Australia. sreece@bigpond.net.au
Objectives:
Despite increasing evidence suggesting that drug addicts have compromised immunity, vigorous discussion continues. One way to examine this clinically is to compare the rates of infections presenting to a clinic which sees both non-substance dependent (N-SUD) and opiate addicted (SUD) patients.
Methods:
A survey was conducted amongst our patients of all infectious presentations.
Results:
Four-hundred and thirty SUD and 116 N-SUD patients of similar ages (mean+/-SD 30.81+/-7.77 years vs. 32.91+/-14.41 respectively) were reviewed. SUD had fewer acute infections (120/430, 28% vs. 51/116 44%, OR=0.60 95% CI 0.40-0.84, P=0.0034) but their severity was greater (P<0.00001). The pattern of infections was also different with respiratory infections predominating in N-SUD (32/50 infections, 64%; seasonally invariant) vs. dental (74/114, 64%) and skin infections (18/114, 16%) in SUD. SUD had significantly more dental infections (74/430 patients 21% vs. 3/116 3%, P=0.0001). In multivariate analysis, group membership was the only variable which explained the variance of "Infection". Chronic hepatitis C (60% vs. 1%, P<0.00001) was more frequent in the SUD but there was no difference in hepatitis B or HIV.
Conclusion:
These data are consistent with clinical immunosuppression in SUD and may reflect immunostimulation and immunosenescence.
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