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For four weeks, Lacie had to wear a backpack containing the drug for 24 hours a day so it could enter her blood intravenously through a picc line in her arm.

Although immunotherapy drugs for gastrointestinal cancers are available, they are delivered intravenously and often exhibit limited effectiveness.

Medications used to treat heart failure include diuretics, which reduce tissue swelling and can be administered orally or intravenously.

Their work revealed a critical difference between vitamin C given intravenously and vitamin C taken orally.

Much of that concern stems from the relaxation of telehealth regulations that allowed doctors to prescribe oral ketamine tablets to patients at home, rather than having it be administered intravenously in a clinic.