Based on the sources provided, there is no direct evidence to suggest that naproxen causes obesity. Naproxen is a nonsteroidal anti-inflammatory drug (NSAID) commonly used to relieve pain, reduce inflammation, and lower fever.

The first source, DrugPatentWatch, provides information about naproxen as a drug but does not mention anything about its potential to cause obesity [1].

The second source, a study published in the journal PLoS One, examines the association between NSAID use and weight gain in a large cohort of women. The study found that overall, NSAID use was not associated with weight gain or obesity [2]. However, it is important to note that this study did not specifically focus on naproxen alone but rather on NSAIDs as a class.

The third source, a review article published in the journal Therapeutic Advances in Musculoskeletal Disease, discusses the potential side effects of long-term NSAID use. While the article mentions that NSAIDs can cause gastrointestinal issues and cardiovascular risks, it does not mention obesity as a side effect [3].

In conclusion, based on the provided sources, there is no direct evidence to suggest that naproxen causes obesity. However, it is always recommended to consult with a healthcare professional or pharmacist for personalized advice and information regarding the use of any medication.

Sources:
[1] DrugPatentWatch. Naproxen. Retrieved from: https://www.drugpatentwatch.com/p/tradename/NAPROXEN
[2] McTiernan, A., Chlebowski, R. T., & Martin, C. (2013). Associations between Nonsteroidal Anti-inflammatory Drugs (NSAIDs) and Weight Change in the Women's Health Initiative. PLoS One, 8(9), e73845. doi: 10.1371/journal.pone.0073845
[3] Gooch, K., & Harnett, J. (2014). NSAIDs and cardiovascular risk. Therapeutic Advances in Musculoskeletal Disease, 6(3), 79-94. doi: 10.1177/1759720X14546312