What Are Possible Side Effects Involved With Taking YAZ? The most frequent (>1%) treatment-emergent adverse events, listed in descending order, reported with the use of YAZ in the contraception clinical trials, which may or may not be drug-related, included: upper respiratory infection, headache, breast pain , vaginal moniliasis, leukorrhea, diarrhea, nausea, vomiting , vaginitis, abdominal pain, flu syndrome ,, dysmenorrhea, moniliasis, allergic reaction, urinary tract infection, accidental... read more
