 [ Symptoms ] going on a long flight with a cold need to sleep sudafed with xanax or sudafed with nyquil  i have a cold and i am going on a very long flight i need to sleep would i be better off taking sudafed with xanax or sudafed with nyquil [ Disease ] you are bound to have some withdrawal symptoms you need to contact your doctor in advance and inform him about this home remedies may be harmful and should be avoided keep yourself well hydrated for next few days