Marwan has recently completed his Masters in Pharmacology from the University of Pretoria, South Africa. He also holds diploma in pharmacology (University of North West, South Africa, 2011), post-graduate Diploma in Research Methodology and Biostatistics (University of Medical Sciences and Technology, Sudan, 2007) and Bachelor of Pharmacy (University of Sanaa, Yemen, 2003).


The association between long-term metformin use and vitamin B12 deficiency has been proven. The risk factors for the deficiency as well as its potential to cause or worsen peripheral neuropathy in T2DM patients have been investigated with conflicting results.

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