Some medical conditions are associated with increased health risks when certain contraceptive methods are used. The UK medical eligibility criteria for contraceptive use (UKMEC) offer guidance on who can safely use contraceptive methods.

The UKMEC assigns personal characteristics and medical conditions to category 1, 2, 3, or 4, based on the safety of using different contraceptive methods with these characteristics/conditions. These categories are described in the table below:

UKMEC Definition of category
Category 1 A condition for which there is no restriction for the use of the method
Category 2 A condition where the advantages of using the method generally outweigh the
theoretical or proven risks
Category 3 A condition where the theoretical or proven risks usually outweigh the
advantages of using the method. The provision of a method requires expert
clinical judgement and/or referral to a specialist contraceptive provider, since
use of the method is not usually recommended unless other more appropriate
methods are not available or not acceptable
Category 4 A condition which represents an unacceptable health risk if the method is used

The above table is reproduced under licence from FSRH.
Copyright Faculty of Sexual and Reproductive Healthcare 2006 to 2016.

UK Medical Eligibility Criteria for Contraceptive Use (UKMEC)