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Which of the following is a characteristic of oil solutions?

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Which of the following is a characteristic of oil solutions?

(a) Free flowing powders

(b) Aqueous solutions

(c) Control drug release by partitioning the drug from the oil

(d) Administration of emulsions

The question was posed to me during an interview.

The origin of the question is Biopharmaceuticals in section Biopharmaceuticals of Drug Biotechnology

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The correct answer is (c) Control drug release by partitioning the drug from the oil

Easiest explanation: Oil solutions control release by partitioning the drug out of the oil in the surrounding aqueous fluids. Vegetable oils such as arachis oil, cottonseed oil, etc. can be used for this. The method is used for only drugs which are lipid soluble and have an optimum partition coefficient.

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