1. Amr M, El-Gilany AH, El-Mogy A et al (2014) Substance abuse and dependence among patients attending an emergency hospital in eastern Nile delta, Egypt. J Psychiatry 17:532–537
2. Barceloux DG, Bond GR, Krenzelok EP, Cooper H, Vale JA (2002) American Academy of Clinical Toxicology practice guidelines on the treatment of methanol poisoning. J Toxicol Clin Toxicol 40(4):415–446
3. Arendt M, Munk-Jorgensen P, Sher L et al (2011) Mortality among individuals with cannabis, cocaine, amphetamine, MDMA, and opioid use disorders: a nationwide follow-up study of Danish substance users in treatment. Drug Alcohol Depend 114(2):134–139
4. Bakhaidar M, Jan S, Farahat F, Attar A, Alsaywid B, Abuznadah W (2015) Pattern of drug overdose and chemical poisoning among patients attending an emergency department, Western Saudi. J Community Health 40(1):57–61
5. Beakley B, Kaye AM, Kaye AD (2015) Tramadol, pharmacology, side effects, and serotonin syndrome: a review. Pain Physician 18:395–400