Pharmaceutical is pronounced far-mə-SOO-ti-kəl (IPA /ˌfɑːrməˈsuːtɪkəl/). The 'ce' is /s/ — say 'SOO'; stress that third syllable.
IPA: /ˌfɑːrməˈsuːtɪkəl/
Syllables: far · mə · SOO · ti · kəl
Common ESL mistake: Learners say 'far-ma-KOO-ti-kal' using /k/ instead of /s/.
Tip: The 'ce' is /s/ — say 'SOO'; stress that third syllable.