[1] World Health Organization. ATLAS on substance use: resources for the prevention and treatment of substance use disorders. Geneva:( 2010).
[2] Loffredo CA, Boulos DN, Saleh DA, et al. Substance use by Egyptian youth: current patterns and potential avenues for prevention. Substance use & Misuse. 2015;50: 609-18.
[3] Kumsar NA, Kumsar Ş, Dilbaz N. Sexual dysfunction in men diagnosed as substance use disorder. Andrologia. 2016;48: 1229-35.
[4] Zaazaa A, Bella AJ, Shamloul R. Drug addiction and sexual dysfunction. Endocrinology and Metabolism Clinics of North America. 2013;42: 585-92.
[5] Ajo R, Segura A, Inda MM, et al. Opioids Increase Sexual Dysfunction in Patients With Non-Cancer Pain. The Journal of Sexual Medicine. 2016;13: 1377-86.
[6] Shamloul R, Bella AJ. Impact of cannabis use on male sexual health. The Journal of Sexual Medicine. 2011;8: 971-5.
[7] Shamloul R, Ghanem H, Abou-zeid A. Validity of the Arabic version of the sexual health inventory for men among Egyptians. International Journal of Impotence Research. 2004;16: 452-5.
[8] Arafa M, Shamloul R. The Arabic version of the Erection Hardness Score. The Journal of Sexual Medicine. 2009;6: 3501-3.
[9] Arafa M, Shamloul R. Development and evaluation of the Arabic Index of Premature Ejaculation (AIPE). The Journal of Sexual Medicine. 2007;4: 1750-6.
[10] Vallejo-Medina P, Sierra JC. Effect of drug use and influence of abstinence on sexual functioning in a Spanish male drug-dependent sample: a multisite study. The Journal of Sexual Medicine. 2013;10: 333-41.
[11] Abdel-Hamid IA, Andersson KE, Waldinger MD, Anis TH. Tramadol Abuse and Sexual Function. Sex Med Rev. 2016;4: 235-46.
[12] Miotto K, Cho AK, Khalil MA, Blanco K, Sasaki JD, Rawson R. Trends in Tramadol: Pharmacology, Metabolism, and Misuse. Anesthesia and Analgesia. 2017;124: 44-51.
[13] Bassiony MM, Salah El-Deen GM, Yousef U, et al. Adolescent tramadol use and abuse in Egypt. The American Journal of Drug and Alcohol Abuse. 2015;41: 206-11.
[14] Hamdi E, Gawad T, Khoweiled A, et al. Lifetime prevalence of alcohol and substance use in Egypt: a community survey. Substance Abuse. 2013;34: 97-104.
[15] Hadland SE, Levy S. Objective Testing: Urine and Other Drug Tests. Child and Adolescent Psychiatric Clinics of North America. 2016;25: 549-65.
[16] Bassiony MM, Abdelghani M, Salah El-Deen GM, Hassan MS, El-Gohari H, Youssef UM. Opioid Use Disorders Attributed to Tramadol Among Egyptian University Students. Journal of Addiction Medicine. 2018;12: 150-55.
[17] Lai S, Lai H, Page JB, McCoy CB. The association between cigarette smoking and drug abuse in the United States. Journal of Addictive Diseases. 2000;19: 11-24.
[18] Abdelazim S, Abolmagd SF, Abdalla H, Enaba DA, Elsheikh SM, Moselhy HF. Sexual Dysfunction and Sex Hormone Levels in Egyptian Opioid-Dependent Males American Journal of Pharmacy & Health Research. 2015;3: 81-91.
[19] La Pera G, Carderi A, Marianantoni Z, Peris F, Lentini M, Taggi F. Sexual dysfunction prior to first drug use among former drug addicts and its possible causal meaning on drug addiction: preliminary results. The Journal of Sexual Medicine. 2008;5: 164-72.
[20] Calsyn DA, Baldwin H, Niu X, Crits-Christoph P, Hatch-Maillette MA. Sexual risk behavior and sex under the influence: an event analysis of men in substance abuse treatment who have sex with women. The American Journal on Addictions. 2011;20: 250-6.