Yes, you can switch eyelash serums if you wish to try a different product or if you're not satisfied with the results you're getting from your current one. However, it's important to keep in mind a few factors when switching eyelash serums:

1. Ingredients: Take a look at the ingredients list of the new serum you plan to switch to. Look for key active ingredients that promote eyelash growth, such as peptides, biotin, or panthenol. Ensure that the new serum contains ingredients that are beneficial for your lashes.

2. Application: Different serums may have different application methods. Some may require a brush or applicator, while others may be applied using a mascara-like wand. Make sure you're comfortable with the new application method.

3. Patch Test: Before using any new product on your eyelashes, it's essential to perform a patch test. Apply a small amount of the serum to your forearm or behind your ear and wait 24 hours to check for any adverse reactions or allergies.

4. Discontinue Previous Serum: When switching serums, it's best to discontinue the use of your previous serum. Mixing different serums may not provide optimal results and could potentially lead to irritation or other unwanted effects.

Remember, individual results may vary, so it's always a good idea to research and read reviews about the new serum you plan to switch to. Additionally, consult with a dermatologist or an ophthalmologist if you have any concerns or specific conditions related to your eyelashes.