A member asked:

How quickly does xenical work?

2 doctors weighed in across 2 answers

Immediately : Xenical works within 20-30 minutes of taking the medication.

Answered 10/14/2012

6.4k views

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Immediately: The same day you take it with food. Careful with the total fat you eat when you take this medicine.

Answered 4/21/2019

4.9k views

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