Like other medications containing sildenafil citrate, Vigora Oral Jelly works by increasing blood flow to the penis, helping men achieve and maintain an erection when sexually aroused. However, it comes in a jelly form, which may be more convenient for some individuals who have difficulty swallowing tablets.Additionally, it's crucial to be aware of potential side effects and interactions with other medications. Common side effects of sildenafil citrate may include headache, flushing, indigestion, nasal congestion, and changes in vision. Serious side effects such as sudden vision loss or hearing loss are rare but require immediate medical attention.