For a downward-turning nasal tip, both Botox and filler can sometimes be used, but they work in very different ways. Botox can be helpful when the depressor septi muscle is contributing to the downward movement of the nasal tip, because relaxing that muscle may allow the tip to sit slightly higher. The lift is generally subtle and temporary. Filler can sometimes be used to improve the appearance of the nasal tip or support certain areas, but injecting filler near the nose requires a great deal of caution because of the important blood vessels in this area and the potential for serious vascular complications. I would not consider filler the first choice simply to relax the depressor septi muscle. So, if the main issue is that the tip actively pulls downward when you smile or move your upper lip, Botox may be the more appropriate approach. If there is also a structural or contour issue, that would need to be evaluated separately.