No question is too basic. The basic ones are the ones nobody writes down, and they are what someone three weeks into a diagnosis is desperate to find.
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The same brand is formulated differently in different markets, and half the bad advice online comes from ignoring that.
It saves everyone repeating the obvious answer, and it usually reveals the actual problem.
People can say what happened to them. That is useful and it is not the same thing. For what a label says, scan it.