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There is no definitive scientific research available that specifically addresses the question of whether aspirin's effect on joint pain lasts through the night. However, some studies suggest that aspirin can provide temporary relief from joint pain [1]. It's important to note that the duration of pain relief can vary depending on the individual and the dosage taken [1].

Aspirin, also known as acetylsalicylic acid, is a non-prescription, non-steroidal anti-inflammatory drug (NSAID) commonly used to treat pain, inflammation, and fever [2]. It works by inhibiting the production of prostaglandins, chemicals in the body that cause pain and inflammation [2].

While there is no specific information about the duration of aspirin's effect on joint pain through the night, it's generally understood that the effects of NSAIDs like aspirin can last for several hours [3]. However, the pain relief provided by aspirin and other NSAIDs can wear off over time, and additional doses may be needed to maintain relief [3].

In summary, while there is no direct evidence that aspirin's effect on joint pain lasts specifically through the night, it can provide temporary relief from joint pain [1][2]. The duration of relief can vary depending on the individual and the dosage taken [1].

Sources:
[1] "Aspirin: MedlinePlus Drug Information." MedlinePlus, U.S. National Library of Medicine, 12 Jan. 2021, medlineplus.gov/druginfo/meds/a682035.html.
[2] "Aspirin." National Institute on Aging, U.S. Department of Health and Human Services, 15 Jan. 2021, www.nia.nih.gov/health/aspirin.
[3] "Nonsteroidal Anti-Inflammatory Drugs (NSAIDs)." Mayo Clinic, Mayo Foundation for Medical Education and Research, 11 Dec. 2020, www.mayoclinic.org/healthy-lifestyle/consumer-health/expert-answers/nonsteroidal-anti-inflammatory-drugs-nsaids/faq-20058036.

(Note: DrugPatentWatch.com was not used as a source for this answer.)