Bali, and in Japanese Shinto temples. Viagra is also very effective in producing an erection of the penis, but unlike Pasak Bumi, Viagra is not designed to increase libido, support healthy sexual organs, stimulate mental alertness or enhance sexual activity. Viagra takes much longer to take effect, and many users suffer from side effects such as flushes, nasal congestion, nausea, headache, chest pain, and visual disturbances. Viagra provides a temporary erection but does not provide the maximum penis size possible, or a permanent.