Omnicef for Sinusitis User Reviews

• tig...
• November 2, 2013

"Fantastic at clearing the sinus infection. I'm on day 4 and it's almost completely gone. The first two days were miraculous. But then, starting day 3... My stomach and intestines are rumbling almost constantly and I'm 'pooping' brown water 5+ times a day. I'm also utterly exhausted and weak, making it virtually impossible to actually do anything. If this gets much worse, I'm going to have to stop using this before the 10-day course runs out."

• Ran...
• August 20, 2018

"I started taking this for a sinus infection. The first 5 days I was fine and just added extra yogurt to my diet to be safe. By day 6, I had a little bit of diarrhea, which was expected. It turned into diarrhea every 45 minutes until I had nothing left for the next 24 hours. Then it was like my bowels were being turned inside out, and all that came out was black mucus. I immediately stopped the medication. I’ve been about 36 hours without it, and things are slowly looking up. But I have had to miss work and other events because of it. My doctor said this was safe for those that are allergic to amoxicillin, but apparently not. I do not recommend this to anyone. If you read most other reviews, it’s about the same thing."

• Emm...
• August 5, 2010

"I have taken it many, many times for my chronic sinus infections, and it seems to be the only thing that ever gets rid of the infection. I do get stomach aches from it and nausea, but it does what it's supposed to."

• Anonymous
• March 25, 2011

"300 mg 2 x day for 7 days prescribed for sinusitis. I think I may have felt like I was getting slightly better the 2nd and 3rd day, but after that it went back to the same as before. No adverse side effects, just didn't seem to work."

• jhh...
• April 10, 2009

"Omnicef was effective in treating my daughter's sinusitis. However, she broke out in hives a day after finishing the medication. Although it is not certain the medicine caused her hives, it is very ironic that they broke out within 24 hours of finishing the antibiotic."

• Anonymous
• February 16, 2017

"I took this medicine for ten days. I took 300 mg twice a day. It was horrible, the side effects that I experienced. I had the worst yeast infection and broke out in the worst rash I have ever seen. It would bleed and itched so bad it about drove me crazy. I finally went back to the doctor. It took three months to get it all healed up. They should take this medicine off the market."

• Boo...
• April 25, 2016

"I have been on this for 5 days, sort of working, still have the headache though. I haven't really had any side effects yet. But I was given a 21-day dosage for (2) 300 mg capsules. I have had 4 sinus infections since January. Hope it helps get rid of the headache. It has helped with the drainage and coughing though."

• Not...
• Taken for less than 1 month
• October 12, 2021

"This medicine made me feel worse than the original symptoms. I usually have a high tolerance for meds, don’t usually get dizzy or feel nauseous ever. But this medicine made me feel as if I was suffering from being hungover. I would drive 8 hours later after taking the meds and would feel like I could black out whenever. I would randomly feel nauseous. The headaches were a constant theme. Now that I’ve read the comments, I can attribute some of the diarrhea I had to it. I went back to the doctor and was prescribed Doxycycline, so I’m on day 4 and I feel better but still suffer from a cough."

• Anonymous
• Taken for less than 1 month
• March 8, 2014

"Worked very well for severe sinus infection."

• Anonymous
• October 28, 2008

"This medicine works very well. I didn't have a yeast infection, nor did I have the upset stomach, which I usually have with antibiotics."

• sur...
• January 9, 2012

"Today is day 6 of this medicine, and it just isn't working. I would have thought that I would have some kind of relief by now, but not."

• g8r...
• July 2, 2008

"It worked for me with no side effects at all."

• Anonymous
• December 21, 2010

"I've only been on it 2 days, but so far, so good! I feel much better, cough is gone, and no side effects. Will use again if I need it."

• may...
• June 20, 2010

"This antibiotic was the best for my sinus infection."

• Anonymous
• April 10, 2009

"I have only taken 2 doses so far. It seems to be working, and I don't have all the side effects. I will use it again."

• csj...
• Taken for less than 1 month
• May 22, 2025

"Round-the-clock diarrhea ever since I started this drug! It seems to have helped my sinus infection, though. This is not something I ever would want to take again."

• Nay...
• Taken for less than 1 month
• November 7, 2020

"On the third day of taking Omnicef, I realized I was again constipated, which is usually the norm for me, but I've noticed more gas and an extremely foul odor from my stools that I can't describe."