Subcutaneous

Advantages:

Can be given by patient, e.g. in the case of insulin

Absorption slow but usually complete. Improved by massage or heat. Vasoconstrictor may be added to reduce the absorption of a local anesthetic agent, thereby prolonging its effect at the site of interest.

Disadvantages:

Can be painful

Irritant drugs can cause local tissue damage

Maximum of 2 ml injection thus often small doses limit use.

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Copyright 2001-3 David W. A. Bourne (david@boomer.org)