Aya S. Ahmed et al. 2023. Evaluate the Effect of Covid-19 on the Availability and Access to Medication: A Study Influenced the Adherence of Chronic Medications among Patients in the Khartoum Locality. Advanced Concepts in Pharmaceutical Research Vol. 2. (Nov. 2023), 49–62. DOI:https://doi.org/10.9734/bpi/acpr/v2/11123F.