Sulfamethoxazole and severe headaches

I have had a horrible reaction to Sulfameth. At first, it was effective in treating my acne, but on the 5th day, I began to get severe headaches, stomach pain (which I now realize was the pain caused by water retention), and a rash began to develop. I lowered to dose to 800 mg/day at the suggestion of my dermatologist, and now the rash covers my body and my face is bright red and itches like crazy (I want to reach for some sandpaper). I don't know why this drug is on the market, because I have heard from friends people often react to Sulfameth and similar drugs.

I went to the doctor complaining of a mild headache and being nauseous. After 5 days of taking this medicine (Sulfameth Trimethoprim) I am feeling 100% WORSE! This medicine has caused me to feel nauseous, moody, have severe headaches, loss of appetite, and my food all tastes like it has traces of lead in it. I was also prescribed Pseudovent along with a medicine to treat any yeast infection that might come as a side effect from the Sulfameth Trimethoprim. I am going to stop taking these medicines because I feel really bad. I wouldn't advise anyone to take these w/out seriously questioning your doctor about their side effects and any other options. I'll stick with Mucinex for any congestion and Tylenol Cold and Flu for those symptons.

I'm taking Sulfameth/Trimethoprim 800/160 for some infected hairs when I shave my legs, i've had severe headaches, constipation, neck pain, nausea, and very thirsty.

I was prescribed this medication for an ear infection. For the first five days, I had severe headaches, dry mouth, and trouble sleeping. On the sixth day, I developed a fever of 101 and had chills bad enough to cause my teeth to chatter. I was also extremely tired and my whole body ached. I though I was coming down with the flu. I went to bed that night, but continued to suffer from chills and was unable to rest comfortably. I awoke at 4am on the seventh day and noticed I had hives all over my face and neck. By 9am, I had red blotches on my chest, stomach, back, and arms. I called the doctor and was told it was probably an allergic reaction and I should come in for a check-up. After seeing the doctor, he said this medication often has a "delayed allergic reaction" that usually shows up around 7 days after beginning the dosage. He told me stop taking the meds and that the rash would probably get worse before it gets better. That's true. It is now day 8 (late) and I have red blotches everywhere on my body and they itch a lot. I will make sure I remember to never take this medicine again. It didn't help with the ear infection either, but nothing has so far. This was the 4th different antibiotic tried.

What most of you are calling side effects...are my symptons before taking the drug. ( Neck aches; nausea; severe headaches.)
I have a sinus infection to which severe headaches and nausea were causing me to miss work. I have taken 5 doses now, and although I am dehydrated, this is the best I have felt in 7 days, and my condition was not improving without the drug.
I do believe either the Sulfameth or Ultracet (for pain) caused the emotional sensitivity, but your body wasn't created to deal with the barage of infection, pain, drugs, and sleeplessness.

Took this for a UTI - stopped taking after 6 days because of:

Fever (101.5) - hot and cold sweats
Severe headaches
Nausea
Dizziness

I would think twice about taking this drug again. It got rid of the UTI fine but the side effects were horrendous - couldn't move out of bed for a whole day.

DRY MOUTH, SEVERE HEADACHES.ABDOMINAL CRAMPS CHEST PAINS , LOSS OF APPETITE, THRUSH, MOODSWINGS.. NO INSTRUCTION OR SYMPTOM LEAFLET PROVIDED .

I have been taking this drug for 3 days now and have had SEVERE headaches. They go away with advil or tylenol but come back as soon as they wear off. I have also noticed increase fatigue and loss of appetite.