1. Tenormin (atenelol) -It is known for treating high BP and chest pain but it can also help kill the pain of migraine.
2. Diamox- known for reducing the severity of glaucoma, a serious eye disease, but it can also prevent or ease altitude sickness, which causes headaches, nausea, shortness of breath, dizziness,and drowsiness.
3. Benadryl - It is known for cutting down on seasonal allergy symptoms like sneezing and runny nose, but it can also knock you out when you can't sleep.-say on that long flights.
4. Beta-blockers( Inderal/ propranolol) It is known for lowering high blood pressure but it can also help you feel less anxious before a big first meeting or a first date.
Now, these are just some of the meds out there, but again these opinions are not always suitable to everyone it's still best that these should be asked to your doctor.