1. National Center for Biotechnology Information. PubChem Compound Summary for CID 135398744, Sildenafil. https://pubchem.ncbi.nlm.nih.gov/compound/Sildenafil. Accessed Apr. 5, 2022.
3. Food and Drug Administration. VIAGRA® (sildenafil citrate) tablets, for oral use. 2014. https://www.accessdata.fda.gov/drugsatfda_docs/label/2014/20895s039s042lbl.pdf.
8. European Medicines Agency. Viagra: EPAR-Product Information. 2022. Available from: https://www.ema.europa.eu/en/documents/product-information/viagra-epar-product-information_en.pdf.
11. BPOM. Cek BPOM. 2022. https://cekbpom.pom.go.id//home/produk/aj06b4jc5le6jojbslrotuflc4/all/row/10/page/2/order/4/DESC/search/5/sildenafil
12. Smith BP, Babos M. Sildenafil. [Updated 2022 Feb 3]. In: StatPearls. Treasure Island (FL): StatPearls Publishing; 2022 Jan-. https://www.ncbi.nlm.nih.gov/books/NBK558978/
13. Kelly LE, Ohlsson A, Shah PS. Sildenafil for pulmonary hypertension in neonates. Cochrane Database of Systematic Reviews 2017, Issue 8. Art. No.: CD005494. DOI: 10.1002/14651858.CD005494.pub4.
14. Li Z, Lv X, Liu Q, Dang D, Wu H. Update on the use of sildenafil in neonatal pulmonary hypertension: a narrative review of the history, current administration, and future directions. Transl Pediatr. 2021;10(4):998-1007. doi:10.21037/tp-20-277