Botox is the most popular neurotoxin on the market for treating wrinkles for adults of any age. If you are unhappy with the development of fine lines and wrinkles on your face, Botox may be able to get you the results you want. I would recommend scheduling a consultation with a qualified aesthetic specialist in your area to determine if Botox is the best method for achieving the results you are seeking. Depending on what part of your face you are targeting for wrinkle removal, injectable fillers may be a better option. While Botox works quickly, its effects are temporary and gradually fade away within six months. If you are looking for a more permanent solution, you may wish to speak with a board-certified plastic surgeon about a facelift or other surgical options. However, at 42 you are most likely experiencing only mild wrinkles that can usually be successfully treated with Botox and other minimally-invasive cosmetic treatments. You are certainly not too old to get Botox and start thinking about your aesthetic goals for the future. Hope this helps.