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It's a gradual effect. I would say anywhere from 20-45 minutes depending on dosage. It also depends on physical cravings or mental cravings. You will notice an increase in heart rate, cold sweats, dry mouth as some of the side effects and can also lead to insomnia and mood swings.

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16y ago

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For me, the appetite suppressant side effect of Strattera kicked in after about 1 week on the medication

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9y ago
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Q: How long does it take phentermine to suppress appetite?
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