Pack enough of each medication to last through the whole trip. If medications are taken "as needed," err on the generous side, as the rigors of travel can sometimes worsen otherwise stable conditions. Keep medications in their original pharmacy containers and pack them in carry-on rather than checked luggage to minimize the risk of loss. If the medications are controlled substances (narcotics), check the customs regulations in the destination country.
A medical profile summarizes a person's medical history, stating each diagnosis and the medications taken, as well as giving the family doctor's and specialists' contact information. If your disabled friend needs emergency care while away from home, the medical profile will ensure that your friend's treatment is as congruent as possible with her doctors' plan for her care.
A person with no disability may have a health crisis while on holiday, but the risk of this is increased for a person who is disabled. Medical insurance for travel can be purchased along with the ticket. Be aware that travel insurance only covers emergencies, and coverage may be refused if a medical condition was not stable for at least six months before departure. Your friend's doctor can provide a letter stating that, while he does have an identified disability, his condition is considered stable.
Pack the assistive devices and supplies your disabled friend uses, such as diabetic supplies, medically necessary liquids, wheelchair, walker and oxygen tank. When flying, the normal limit for carry-on luggage does not apply to these items. Tag everything with identification information to avoid loss, and bring documentation stating that they are required for your friend's health. Check the Transportation Safety Administration website for information about specific devices and supplies.
If your disabled friend uses a service animal, such as a seeing eye dog or an emotional support animal, pack what the animal will require for the whole trip. Include food and water for the plane, vaccination record, carrier, pee pads and an extra leash and collar. Carry a copy of the documentation that this is a service animal rather than a pet. If traveling outside the country, investigate the regulations in the destination country regarding service animals, and have the animal's documentation translated into that country's language.
Investigate the typical daytime and evening temperatures and allow for variations. Choose clothing made of fabrics that wick perspiration away, and be aware that people in wheelchairs may get chilled sooner than others. Plan for comfort as well as fashion. If a favorite blanket or pillow will help your friend to sleep better, consider bringing them, even if this requires a second suitcase. The additional expense may make the difference between an enjoyable trip and a difficult one.
Travel is a time to be out and about, seeing new sights and having new experiences. However, if your disabled friend tires easily or may have to spend more time resting than the typical traveler, pack reading material, an MP3 player and other small portable leisure resources. Consider an e-book reader rather than loading down the suitcase with heavy books. A blank notebook and new pen will encourage your friend to journal his adventure.