Pengaruh ekstrak air rosella (hibiscus sabdariffa l.) terhadap farmakokinetik dan farmakodinamik aspirin pada tikus jantan galur sprague-dawley: studi interaksi herbal-obat = The effects of aqueous extract of roselle (hibiscus sabdariffa l) on pharmacokinetics and pharmacodynamics of aspirin in sprague-dawley male rats: a study of herbs–drug interaction