Contraceptive intracervical device and novel nonsystemic agents for the prevention of conception and disease
First Claim
1. An intracervical device which comprises:
- a spermicidal composition which consists of an effective amount of an agent selected from the group consisting of silver, magnesium, zinc, copper, cadmium or arsenic and their salts and oxides for use as a contraceptive device;
the agent being imbedded an excipient, the excipient comprising an erodible polymer which controls the release rate of the agent;
means to secure the device in the cervix; and
means to remove the device from the cervix.
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Accused Products
Abstract
An intracervical device for the controlled release of an active agent for the prevention of both specific sexually transmitted diseases and pregnancy. The device consists of an entirely erodible polymer, or a combination of an erodible polymer with a skeletal polymer capable of maintaining therefor mechanical properties over long duration in the body. The active agents can include one or more than one of a large family of insoluble metal salts which have been shown to affect sperm motility and/or viability and are effacious in the prevention of sexually transmitted diseases. These agents are slowly released over a defined period of time ranging from one month to up to 18 months in duration due to erosion of the polymer matrix.
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Citations
17 Claims
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1. An intracervical device which comprises:
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a spermicidal composition which consists of an effective amount of an agent selected from the group consisting of silver, magnesium, zinc, copper, cadmium or arsenic and their salts and oxides for use as a contraceptive device; the agent being imbedded an excipient, the excipient comprising an erodible polymer which controls the release rate of the agent; means to secure the device in the cervix; and means to remove the device from the cervix. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16)
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14. A spermicidal composition which consists of:
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an effective amount of an agent selected from the group consisting of silver, magnesium, zinc, copper, cadmium or arsenic and their salts and oxides for use as a contraceptive device; and an excipient, the excipient comprising an erodible polymer which controls the release rate of the agent;
said agent being imbedded in said excipient. - View Dependent Claims (15, 17)
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Specification