Does sildenafil help mountain climbers alleviate altitude sickness?

In recent years, some high-altitude travelers have also prepared some sildenafil to help overcome altitude sickness. This is because sildenafil can reduce systolic pulmonary artery pressure, improve pulmonary circulation, enhance gas exchange, and reduce oxygen consumption to prevent the occurrence of high-altitude hypoxemia.
The research progress on the anti hypoxic effects of sildenafil, published in 2009, also mentioned that sildenafil has been applied in high-altitude fields in recent years and has been found to have a wide range of anti hypoxic effects.