Bronchitis symptoms symptoms and conditions

This site is great! I developed a cold 2 months ago that turned into this severe bout of sore throat and bronchitis symptoms. I do have allergies and take otc meds. Because I was having such trouble breathing my doctor gave me 2 weeks worth of singulair. I'm also on several other meds to try and clear up this bronchitis, but the singulair is the only "new" med, as I have taken the other meds in the past. I noticed last week that I was breaking out in hives. Itching all over and especially on the left side of my face. At first I just thought I'm falling apart, but then I began wondering if it could be the singulair. Thanks to the comments here I'm stopping singulair. Doctors, as well intentioned as they are, really don't know about most of the meds they prescribe. And it is irresponsible for any of them to just say "no it's not the medication", when they really don't know. That's why the internet is such a great tool!

Help!
My father who is almost 73 was prescribed Levaquin for a possible sinus infection. He took the last dose of a ten day prescription on April 26 (Today is May 17} Almost a month later he is suffering from many flu-like symptoms(fever, chills, weakness, loss of appetite, and etc. As well as the typical tendon pain and according to the Dr. - Bronchitis) My question is how typical is it to have the flu, bronchitis symptoms 3 weeks later? Any suggestions would be greatly appreciated!

I've been on 100mg of Doxycycline for 4 days due to Bronchitis. I've experienced dizziness, disorientation, lack of appetite, and profound fatigue. While my Bronchitis symptoms are improving, the dizziness and fatigue are really limiting anything I can do during the day. I did some errands for about an hour and a half today and had to come home and take a 2 hour nap to recover. I've not had this happen to me before while taking meds of this sort.