

The pills had no effect on my headache.
[ðə ˈpɪlz həd ˈnoʊ ɪˈfɛkt ˈɔn ˈmaɪ ˈhɛdˌeɪk.]
Does this medicine have any side effects?
[dəz ˈðɪs ˈmɛdəsən həv ˈɛni ˈsaɪd ɪˈfɛkts?]
You'll feel the effect in about twenty minutes.
[ˈjul ˈfil ðə ɪˈfɛkt ˈɪn əˈbaʊt ˈtwɛnti ˈmɪnəts.]
"effect" is in the lesson "Hospital" (Level 42), along with 11 other useful words. LinDuo has 180 topic lessons like this one, 2,375 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.