Shahin Akhondzadeh

According to his ResearchGate profile, Shahin Akhondzadeh's main research interest is repositioning psychopharmacology in the treatment of Psychiatric Disorders.

Recent RCT studies

L-carnitine adjunct to risperidone for treatment of autism spectrum disorder-associated behaviors

Results: L-carnitine adjuvant to risperidone could improve irritability and hyperactivity features in children with ASD.

Although scores of ABC-C subscales significantly decreased in both groups over the trial period, the combination of l-carnitine and risperidone resulted in more reduction on the irritability and hyperactivity subscales compared to the combination of risperidone and placebo (P = 0.033 and P < 0.001, respectively). However, changes in lethargy, stereotypic behavior and inappropriate speech subscales were similar between groups. In conclusion, l-carnitine adjuvant to risperidone could improve irritability and hyperactivity features in children with ASD.

Celecoxib monotherapy for treatment of moderate depressive symptoms following COVID-19 infection

Results: A total of 62 patients were included. GLM repeated-measures showed a significant effect of time × treatment (F = 12.95, df = 1.98, p < 0.001) for celecoxib, suggesting superior improvement of depressive symptoms in celecoxib compared to placebo from baseline to the study endpoint. HDRS scores in the celecoxib group showed a greater decline from baseline to both week 3 (t = 4.12, p < 0.001, Cohen's d = 1.10) and week 6 (t = 4.76, p < 0.001, Cohen's d = 1.27), compared to the placebo group. Rate of response to treatment (70% vs 9%, p < 0.001) and remission (67% vs 0%, p < 0.001) was significantly higher in celecoxib compared to the placebo group at week 6. Adverse event frequencies were not significantly different between the two groups.
Conclusion: We demonstrated that treatment with celecoxib significantly improved depression scores of patients with depressive symptoms following COVID-19 infection. Further trials with larger sample sizes and longer study periods should assess our findings before any suggestion for clinical use. The trial was prospectively registered at the Iranian registry of clinical trials (www.irct.ir; registration number: IRCT20090117001556N142).

Reboxetine Combination Therapy With Fluoxetine in Moderate to Severe Obsessive-Compulsive Disorder

Results: A total of 76 patients completed the trial. There was no significant difference between the 2 groups in baseline Y-BOCS scores. General linear model repeated-measures showed significant effects on time-treatment interaction on total Y-BOCS (F = 6.33, df = 1.42, P = 0.006) and obsession subscale scores (F = 10.39, df = 1.48, P < 0.001), and insignificance on compulsion subscale scores (F = 1.86, df = 1.24, P = 0.173). Reboxetine combination therapy demonstrated a higher partial and complete treatment response rate (P < 0.01) according to the Y-BOCS total scores. There was no significant difference between the 2 groups in the frequency of adverse effects.
Conclusions: Reboxetine combination therapy with fluoxetine can effectively improve symptoms in patients with OCD in a short period of treatment. However, further studies with larger sample sizes and longer follow-up periods are needed to confirm these findings.This trial was registered with the Iranian Registry of Clinical Trials (www.irct.ir; No IRCT20090117001556N129).

L‐theanine combination therapy with fluvoxamine in moderate‐to‐severe obsessive–compulsive disorder

Results

From a total of 95 evaluated patients, 50 completed our study; 30 were randomly assigned to each group. Multivariate analysis (ANOVA) showed a significant effect of time treatment for L-theanine in obsession subscale (F = 5.51, P = 0.008) of the Y-BOCS score but not in the total and compulsion scores. Our results showed significantly more improvement in obsession subscale scores in L-theanine compared to placebo group (P = 0.007, Cohen's d = 0.82). Also, total Y-BOCS scores were lower in L-theanine compared to placebo group at week 5 (P = 0.039, Cohen's d = 0.60) and 10 (P = 0.008, Cohen's d = 0.80). However, there was no significant between-group differences in compulsion subscale scores. Complete response was also more frequent in the L-theanine group (P = 0.0001).

Conclusion

Findings in this study suggest L-theanine as a relatively safe and effective adjuvant therapy for moderate to severe OCD.

https://doi.org/10.1111/pcn.13565

Famotidine on cognitive and behavioral dysfunctions induced in post-COVID-19 infection

Results: At weeks 6 and 12, patients in the famotidine group had significantly higher MMSE scores (p = 0.014, p < 0.001, respectively). Regarding the MoCA scale, the famotidine group had a significantly higher score at weeks 6 and 12 (p = 0.001, p < 0.001, respectively). Considering the HAM-D scale (Hamilton Depression Rating Scale), at weeks 6 and 12, the famotidine group experienced a larger reduction (p = 0.009, p = 0.02, respectively). Additionally, comparison of the HAM-A scale scores (Hamilton Anxiety Rating Scale) at weeks 6 and 12 showed a statistically significant larger reduction in the famotidine group (p = 0.04, p = 0.02, respectively). The two groups did not differ in the frequency of adverse effects.

Conclusion: Our study supports safety and efficacy of famotidine in treating cognitive impairment, depression and anxiety symptoms induced by COVID-19.

Trial registration: This trial was registered at the Iranian registry of clinical trials (IRCT: www.irct.ir; registration number: IRCT20090117001556N138).

https://doi.org/10.1016/j.jpsychores.2023.111389

Notable papers

Clinical trial of adjunctive celecoxib treatment in patients with major depression (July 2009)

Results: The results of this study suggest that celecoxib may be an effective adjuvant agent in the management of patients with major depression and anti‐inflammatory therapies should be further investigated.