Alpelisib is a kind of inhibitor specifically for HR /HER2 breast cancer that has PIK3CA mutations. It works by focusing on the PI3K signaling. You can get it in 50 mg, 200 mg, or 300 mg strengths, all in film-coated tablets.
The usual dosage is 300 mg taken once a day, and you should take it with some food. These tablets come in blister packs with 28 tablets in each pack.