Panadol Extra is paracetamol with caffeine, not acetylsalicylic acid, which is Aspirin.

Ah, my bad. So, could look for "acetylsalicylic acid + caffeine" combos from brands other than Bayer. Except if there's some special legal restriction for acetylsalicylic acid in Singapore.

Hm, now that you mention it, it's not common to see Aspirin here in the drug stores. Apparently you can buy low dosage Aspirin online but the regular dosage seems elusive. I'll ask in the pharmacy next time...

NSAIDs : https://news.ycombinator.com/item?id=35311721

Non-Steroidal Anti-Inflammatory Drugs (NSAID) : https://en.wikipedia.org/wiki/NSAIDs

  'NSAIDs and Gastrointestinal (GI) Injury'

<https://scholar.google.com/scholar?&q='NSAIDs and Gastrointe...>

Proton Pump Inhibitors (PPIs) : https://en.wikipedia.org/wiki/Proton-pump_inhibitor

List of Proton Pump Inhibitors - Uses, Side Effects : https://www.drugs.com/drug-class/proton-pump-inhibitors.html

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Acetaminophen : https://news.ycombinator.com/item?id=35310951

N-acetyl-para-aminophenol (APAP), Acetaminophen, Tylenol, Paracetamol, Panadol, others : https://en.wikipedia.org/wiki/Acetaminophen

  'Acetaminophen and Alcohol Hepatotoxicity, Liver damage'

<https://scholar.google.com/scholar?&q='Acetaminophen and Alc...>

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  'P450 Drug Interactions'

Cytochrome P450 : https://en.wikipedia.org/wiki/P450

List of Cytochrome P450 Modulators : https://en.wikipedia.org/wiki/List_of_cytochrome_P450_modula...