Noses symptoms and conditions

I have a question that will help me continuing looking for information. I can understand that in the case of asthma that Singulair would provide immediate relief. If it is used for seasonal allergies or other allergies without asthma, does it work right away or does it take a period of days or weeks to be effective? If it takes time, could you tell me how long it took in your situation.

sorry one more thing..i have the eye thing especially when im on the computer i cant see for shit..the reason why i went to the doctor was because i found a lump in my neck..my lymph noses in my neck are completely swollen they even did a ultrasound on my neck this week..anyone have this. hat happens if you stop the pll mid pack

I went to my Doctor with a few complaints about some aches and pains about a year ago. He decided I was depressed and put my on Effexor 75mg.
At first I had no side effects from the drug. Then I forgot to take 2 doses. I was outside picking up leaves when I went into this terrible time of vertigo. I couldnt walk my whole world was spinning. I immediately thought it was because of missing the doses. The vertigo lasted 3 days. My Doctor told me it was no way caused by The Pill and that It was most likey an inner ear problem. I decided to cut the pill in half on my own. Even with that little of a dose, if I forget to take it I immediatley start to feel side effects such as a very heavy feeling in the top of my head. vertigo, confusion, low concentration, fuzzy eye sight and with any noses, or even if my husband starts to talk I get a jolt like feeling in my head. On an everyday basis while taking the small doses I have to be carefull not to go down to a laying position, or change my position to fast because I will have vertigo. Not to mention my libido is gone. No one told me of all these side effects, I wouldnt of ever started it!!
Today would have been day 3 of cutting my half of a pill in half but when I woke up I was having all of the side effects I mentioned above so I had to take the whole half which is only 37.5 mg!!
How Do I get off this nasty pill??