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If the investigation is terminated, suspended, discontinued, or completed, the sponsor- investigator is responsible for assuring that all co-investigators return any unused supplies of the investigational drug to the sponsor, or otherwise provide for disposition of the unused supplies of the drug under 21 CFR 312.59 [21 CFR 312.62].The sponsor- investigator must maintain records of the disposition of the drug as described above.
As an investigator, the sponsor-investigator has all the responsibilities of investigators in any clinical trial.