Please follow https://api.fda.gov/drug/event.json?search=_exists_:(patient.reaction.reactionmeddrapt.exact)+AND+patient.drug.openfda.generic_name.exact:(%22ASPIRIN%22)&limit=1&skip=0.

Please follow https://api.fda.gov/drug/event.json?search=_exists_:(patient.reaction.reactionmeddrapt.exact)+AND+patient.drug.openfda.generic_name.exact:(%22ASPIRIN%22)&limit=1&skip=0.