WHEN travelling abroad, make sure you take a detailed letter from your GP detailing your condition and any medication you may be taking.

That's the advice of Helen Johnson, Northern Ireland Travel News' travel health adviser, in the wake of the horrendous treatment meted out to a Northern Ireland sufferer from Parkinson's Disease in Canada recently.

When 42-year-old Omagh man, Trevor Hamilton was refused entry into Canada because Calgary airport officials allegedly mistook his Parkinson's illness as drug abuse, it was the start of a horrendous experience.

Mr Hamilton, a father of six, was detained in a cell overnight before being forced to return home - despite producing documentation confirming his condition.

Said Helen Johnson: "If you suffer from a particular medical condition then you should take with you the necessary medication, but also a written letter from your GP stating the condition, the names of your medication and how often you take them."

The European Parkinson's Disease Association says it might be helpful to translate the doctor's letter if you are travelling to a non-English speaking country.

The EPDA also recommends finding out where the nearest doctor is to your accommodation in case of an emergency.

It is important to take a supply of medication away with you, as in some countries counterfeit medicines are a serious problem.

Helen Johnson recommends carrying medication with you at all times. "Always take your recommended does, never give it to anyone else and always finish off the course of tablets prescribed.

"You should always ensure you put your medication in your hand luggage because checked-in baggage could get lost," she advises.

If you are unsure about taking medicines abroad, seek advise from your GP, Pharmacist or practice nurse.