How long does nasolabial fold filler usually last?

As I get older in my late 40s, the nasolabial folds around my mouth are deepening, making me look much older and my complexion appear saggy, so I am worried. It stresses me out every time I look in the mirror, so I am thinking of getting a procedure at a dermatology clinic, but I am most curious about how long the filler will last.

Since it is not a permanent procedure, I am writing this post because I am curious about how long the filler usually lasts after a single injection and whether I need to keep getting it done periodically.

I am worried because I’ve heard that if injected incorrectly, the needles can shift or clump together. For those who have actually had them injected into the nasolabial folds, I would appreciate your reviews and advice on whether you were satisfied with the effectiveness and duration of the results.