Most of you will not be tested, but more of you could be at a national championships, as an international etc. Probably the biggest dangers are any medication you might take or any supplements.
Medication is probably the easiest to deal with and the key point is to check. This can be done by using the global DRO website where all banned products are shown. For example, if you enter Sudafed into the database it will show that some types are banned. Some Nurofen Cold and Flu medicine also includes prohibited substances.
The Global Drug Reference Online (Global DRO) provides athletes and support personnel with information about the prohibited status of specific medications based on the current World Anti-Doping Agency (WADA) Prohibited List.
Supplements Guidance
The UK Athletic Association provides guidance about supplements and nutrition for Clean Athletes.
If supplements are to be taken these should also be checked out thoroughly. Informed Sport can help. However, it’s not so easy to be 100% sure so be very very careful.