EXHIBIT 99.1 Amphastar Pharmaceuticals Reports Financial Results for the Three Months Ended June 30, 2024 Reports Net Revenues of 182.4MillionfortheThreeMonthsEndedJune30,2024RANCHOCUCAMONGA,CA–August7,2024–AmphastarPharmaceuticals,Inc.(NASDAQ:AMPH)("Amphastar"orthe"Company")todayreportedresultsforthethreemonthsendedJune30,2024.SecondQuarterHighlights●Netrevenuesof182.4 million for the second quarter ● GAAP net income of 37.9million,or0.73 per share, for t ...