Kava and passionflower have long been used in traditional medicine for their calming properties, and the herbs are now sold in stores as capsules or liquid extracts.

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The group infused a plastic-like polymer with microscopic capsules containing a liquid healing agent.

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"Patients can speak to their pharmacist about the option of having the pharmacy compound Tamiflu capsules into a liquid, " DeAngelis said in an e-mail.

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