Advil is a brand name for ibuprofen, a nonsteroidal anti-inflammatory drug (NSAID) that is commonly used to relieve pain, reduce fever, and alleviate inflammation [1]. Echinacea is a plant-based supplement that is commonly used to boost the immune system and prevent or treat the common cold and other respiratory infections [2].

There is no direct evidence to suggest that Advil affects the effectiveness of echinacea. However, it is important to note that Advil and other NSAIDs can have side effects that may impact the immune system. For example, NSAIDs can cause stomach irritation and bleeding, which can weaken the immune system and make it more difficult for the body to fight off infections [3].

Therefore, it is important to use Advil and other NSAIDs as directed and to avoid taking them for extended periods of time. Additionally, it is important to consult with a healthcare provider before taking echinacea or any other supplement, especially if you are taking other medications or have underlying health conditions.

In summary, there is no direct evidence to suggest that Advil affects the effectiveness of echinacea. However, it is important to use Advil and other NSAIDs as directed and to consult with a healthcare provider before taking echinacea or any other supplement.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/ADVIL
[2] https://www.webmd.com/vitamins/ai/ingredientmono-981/echinacea
[3] https://www.mayoclinic.org/diseases-conditions/common-cold/in-depth/cold-remedies/art-20046403