Drug Ratings for KEFLEXAverage Rating: 2.3 (216 Ratings)
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Results are sorted by Date Rating Was Added Key to Ratings: 1=LOW (I would not recommend taking this medicine.) Page: 1 2 3 4 |
Charts & graphs: Reviews Summary for KEFLEX | Top 10 Adverse Effects (reported to FDA)
| RATING | REASON | SIDE EFFECTS FOR KEFLEX | COMMENTS | SEX | AGE | DURATION/ DOSAGE | DATE ADDED |
  | F M | | | | |||
| 1 | UTI | Feeling like I Have The flu. Pelvic cramping, Nauseous and back pain. | I stopped it yesterday, how long dies it take for it TI leave your system | F | 63 | 4 days 500 | 7/7/2017 | 3 | UTI | Rapid heart beat, low energy, bad dreams, some depression. | Initially I was given Cipro for a UTI until my culture results came back. On Cipro I immediately felt depressed but that went away before I finished my course. Then was given Keflex and my heart rate skyrocketed, had nightmarish dreams and was unusually tired. So glad yesterday was my last day on Kelfex and hope to be back to 'me' soon. It worked well for the UTI but hate the side effects. | F | 49 | 7 days 500 mg x2 | 6/10/2017 | 2 | Tooth infection | I immediately began having sharp stomach cramps and noticed an "odd" type of headache which I've never experienced before. Started feeling down and anxious with feelings of despair. And very oddly, my eyelids felt like they weighed a ton and my eyes felt almost " swollen " or glazed over!? Not to mention, I've become uncharacteristicly irritable.Very odd feelings for a drug to give a person.I'm trying to stick with it, but I don't know if I can do this for another week:( | I'm on another medication which interferes negatively with most other antibiotics so keflex unfortunately is all I can take, so I'm in a bad position here. | F | 36 | 4 days | 6/5/2017 | 1 | Strep Group C | Unicorns | Demon Unicorns | M | 38 | 20 days 500 MG | 6/1/2017 | 1 | Infected nail bed | I woke up in the morning after the 1st does w a horrible headache and the back of my head and neck were in odd pain! Here it is 3:51am and after 3 doses my head and neck is so bad I am unable to sleep. Advil will not even ease the pain! Be very careful of the antibiotic! | F | 42 | 2 days | 5/4/2017 | 5 | Infection through a contact burn | Drowsiness | I felt unwell and thought side effects but it was the infection. The dosage of 1 x 250mg x 4 daily was doubled as infection wasn't clearing and by time finished course felt so much better. I would certainly take this medication again. | F | 7 days 250 | 4/24/2017 | 1 | UTI | Nausea,stomach pain,lower abd cramping,dizziness,fatigue,aching in back & legs. | I'm glad I ran across this and it has confirmed the reason why I've been feeling so bad! This drug is like poison to me! I'm going to stop it immediately and I hope these side effects go away soon! | F | 44 | 6 days 1000 mg | 4/23/2017 | 1 | Kidney infection | Serious muscle soreness and pain in arms, back of my head and neck. I also felt very sad-almost despair. I only took one dose, within 2 hours the muscle pain began underneath my upper arms and it began to radiate down my arms. Within 6 hours it was radiating down each side of my spine and was especially painful in my lower back and in the back of my neck and into my head. 24 hours later my underarms are extremely tender and I feel lousy. Also gave me a rapid heart beat. | I stopped this drug after the first dose and will never take it again. My doctor had never heard of these specific side effects and was surprised. | F | 60 | 1 days 3X D | 4/12/2017 | 2 | For an eye infection | Had to stop KEFLEX,,.I could not walk,in so much PAIN.......... | I'm in so much pain in my foot & big toe on my right side,since taking Keflex,it's extremely painful,can't walk on my foot my foot has swollen up like a balloon,burning can't bend my big toe,pain is so strong it's had me up all night,I didn't know there was such a bad side effect,like gout,from taking an antibiotic,it's agony ,extremely painful,please be aware of this side affect as I'm 44 years old. | F | 4 days 250 4X D | 4/7/2017 | 2 | Infection: gums, sinus, bronchitis | Severe muscle pain in back of neck, head, trap muscles, lower and mid back. Increase of muscle spams/pain. | Patients need to be proactive in their own research on medications as sadly the big drug companies have a great deal of influence which I believe includes the FDA and I say that because too many medications with very bad side effects that are still on the market shouldn't be allowed as they are potentially dangerous. Levaquin is another antibiotic that people should avoid at all costs as it comes with potentially very bad side effects. | M | 10 days 750 2X D | 3/23/2017 | 1 | post surgery preventative | No side effects until 2 weeks AFTER taking this horrible drug! I am 2 months out and still having stomach pain and diarrhea. Did it permanently mess up my stomach? I am very sick still. | DO NOT TAKE THIS DRUG! ASK FOR AN ALTERNATIVE!!!! | F | 50 | 5 days 2X D | 3/12/2017 | 4 | Post Back Surgery | I took KEFLEX for 2 days following back surgery as a prevention. I had no side effects. The only effects on my body were due to the expected pain and symptoms following my back surgery. No side effects due to KEFLEX. | F | 60 | 2 days 500 mg 4X D | 2/26/2017 | 3 | Ear infection | Nausea, insomnia, diarrhea the first week, genital itching, yeast infection, irritability, exhaustion, aches, frequent urination and gas | Took this medicine 3x a day, felt sick from day 1. I know that side effects should be expected, but at the time, it seemed to not be worth it. I am 2 days post antibiotic and am slowly feeling better. I powered through it and finished the course but still am having the remnants of side effects. My ear infection is better, but it's hard to justify with all the side effects. I am never taking this medicine again. | F | 31 | 10 days 500mg | 2/13/2017 | 1 | To prevent infection | Keflex was given to me during a minor skin surgery via an IV and I took 2 pills the following day. I was very groggy and dizzy day one following IV and excessively dizzy with nausea the day following the two pills. Doctor told me not to take it anymore and I'm starting to feel better. | F | 40 | 2 days 750mg 2day | 2/8/2017 | 1 | Post surgery infection | No energy headache, diarrhea,not Hungary, dizziness, can't think couldn't go to work on 5th day now have to take for 14 more days! Ugh!!! | F | 53 | 5 days 500mg | 2/3/2017 | 2 | Post surgery infection | crippling diarrhea, depression, anxiety, suicidal thoughts, feelings of hopelessness, constant bad taste in my mouth. | It did help with the infection, but caused so many other problems from the side effects. I'm so relieved to find this thread because I was about to quit my job, break up with my boyfriend and move to a new town based on the feelings of depression and anxiety it caused. I will try not to make any major decisions until it is out of my system. | F | 34 | 7 days 500 3X D | 1/29/2017 | 3 | Ear, skin, & uti | Tired, depressed, anxious, and VERY irritable.Migraines, muscle aches, and cramps too. Remember the awful mood swings of puberty? Like that, but more severe. | Seems to be healing the infections but I don't think the side effects are worth it. | F | 37 | 7 days 500mg3/day | 1/27/2017 | 3 | uTI | Hot flashes, rapid heart beats, nausea, light headed. I am on my last day and very happy this nightmare is over 😕 | F | 44 | 7 days 1000 | 12/28/2016 | 1 | upper respiratory infection | itchiness and hives to days taking drug | Itch and have the hives after ten days of taking keflex | F | 75 | 10 days 250mg 3X D | 12/18/2016 | 1 | Mild infection re hip replacement | Extreme depression and sleepiness. | My recovery from hip replacement surgery was going very well. Two weeks after surgery, the staples were removed at the incision we discovered a mild infection (where some of the staples had entered the skin). I have had surgery before and am familiar with post-surgery depression. My surgeon and I made a point to use pain pills that weren't in the "oxy" family as they have caused depression in the past. I was doing well and recovery was going great. A few days after starting the Cephalexin, I was steeped in horrific depression. And, in the first several days, I was unable to stay awake. The depression is debilitating and is impeding my overall recovery. I know depression can be an issue post surgery but I have no doubt that the Cephalexin has made it much much worse. I have always followed doctor's orders but, with only 5 pills left to go, I'm not going to finish the prescription. | F | 58 | 13 days 500MG 3X D | 12/11/2016 | 4 | Strep Throat | Upset GI and bowels. | I took yogurt to offset the symptoms after my last dose, it helped to stop the stomach upset and bowel problems within 2 days. Rice worked for the diahrea, and stopped it within one day. Might be a good thing for doctors to tell their patients when they use this antibiotic. I have used it several times in the past for the same problem, and for sinus infections. It is a good product. Just a small note: I was told years ago that i could have taken Acidolphilus for the good bacteria but i forgot until i found my own notes a few days ago. | F | 60 | 10 days 30 4X D | 11/26/2016 | 3 | Urinary tract infection | Nausea, abnormal pain, my eyes feel heavy and irritated, and extremely bad migraines I've never experienced migraines this bad before | Does anybody know what I can use for the migraines I literally took like 5 ibuprofens and it still hasn't went away | F | 22 | 7 days 500mg | 11/23/2016 | 1 | Tonsilitis | at first I experienced horrible muscle and joint aches, especially in the thighs and shins, fatigue, panicky and depressed, nausea... then on the last day of taking it I developed an itchy red rash that started on my hands and quickly spread all over my body, vomiting and severe watery diarreah. Still have diarreah, rash and awful nausea three days after stopping drug :( | Do not take this drug, it is poison! | F | 34 | 10 days | 11/19/2016 | 1 | Tonsilitis | at first I experienced horrible muscle and joint aches, especially in the thighs and shins, fatigue, panicky and depressed, nausea... then on the last day of taking it I developed an itchy red rash that started on my hands and quickly spread all over my body, vomiting and severe watery diarreah. Still have diarreah, rash and awful nausea three days after stopping drug :( | Do not take this drug, it is poison! | F | 34 | 10 days | 11/19/2016 | 1 | Skin rash with welts | Severe vertigo, nausea with dry heaving. Made blood pressure go up. Heart rate was erratic slow then high heart rate. Ended up in ER, thought I was having a heart attack. Spent 3 days in hospital, was put through several medical test that were all normal. Determined it was the Keller after taking only 2 pills. | M | 53 | 2 times 500mg 2X D | 11/13/2016 | 1 | Abscessed tooth | It made me feel horrible. Couldn't sleep, nausea and general feeling of being sickly | M | 50 | 1 weeks 300mg | 10/9/2016 | 2 | 1 days | 10/6/2016 | 1 | Sinus infection | Stomach cramps, diarrhea, bad acid reflux, depression, doom feeling, confusion, chest pain, panic, trouble sleeping. | Was supposed to take for 10 days. 3 -250mg capsules two times a day. I am stopping out of fear that this is not good for me. | F | 57 | 8 days 1500mg per | 9/13/2016 | 4 | Bee Sting | 24/7 for 10 days I had Day and night hot flashes absolutely horrid, restless sleeping, wake up at two and 4:00 AM, rash | Other than side effects of medication did work for me | F | 52 | 10 days 500mg | 9/1/2016 | 1 | Post-surgery | Deep fatigue, lasting headache, nausea, vomiting, no appetite, 103 fever, aching joints, severe dizziness, general sense of dread. Two full days after I stopped taking it I am still very sick. KNOW THIS: you CAN stop taking an antibiotic in mid-course. The alleged damage related to doing so is overstated. | If my input stops a single person from taking this accursed medication it was worth the time to offer a review. I have taken numerous antibiotics but never one that produced debilitating side effects like KEFLEX. Avoid this drug and its criminal impact -- demand an alternative! I would not be surprised if this drug has killed people, especially those already in a compromised state. Thanks to this site's owners for providing an outlet to those of us who have suffered due to a dangerous drug. | M | 51 | 2 days | 7/30/2016 | 1 | bacterial infection | This medicine is just not for me. I think I got just about every side effect. 2nd day 6th dose,I am totally crawling out of my skin! Short of breath,cold clammy skin,when I say cold I mean freezing! My pulse was at 40 @ one point. Chest pain elevated blood pressure,frequent Urination,diarrhea. I didn't see anyone else mention a low pulse. I put my experience here so I can maybe help someone else. | F | 40 | 2 days 500 mg 4x | 7/30/2016 | 2 | ear infection | Serious gas!!!! Smells like a dead animal! | I'm allergic to penicillin so Dr gave me keflex. Farting every 10 minutes! The smell is so bad that my family have condemned me to my room. Also heaps of burping and it tastes like the keflex capsule..... So bad!! | F | 33 | 3 days 500mg 4xda | 7/26/2016 | 2 | Prophylactic | Diahrea | F | 43 | 7 days | 7/8/2016 | 5 | UTI | None! | I had flue like symptoms for 3 days, than horrible right back pain. I went to the ER. Was given the first pill there. I went home went to bed. I woke up the next morning feeling 90 percent better by pill 3 I was feeling 100 percent. After feeling so horrible for 3 days I am so thankful for this medication. | F | 30 | 7 days 500mg | 6/22/2016 | 1 | To prevent infection from a cut | My daughter received a deep laceration on her leg and was prescribed Cephalexin generic for Keflex. On the third day my daughter started experiencing horrible headaches and a severe stomach ache. By the 5th day taking this drug she was miserable throwing up with a migraine. | This is a horrible dangerous drug. I regret ever giving this to my daughter. She suffered for no reason!! | F | 10 | 5 days 500 2X D | 6/13/2016 | 1 | UTI | Bad headache, ringing in ears, anxiety, depression (I've NEVER had that before!) pain in lower legs - shins, swollen ankles, high b.p., insomnia, weke up at 4 a.m. no matter what time I go to sleep. Lethargic, weak, tired, indigestion. On day 7 it feels like my UTI is coming back. Ribs are sore. Increased appetite (could be because I'm too exhausted to do anything). | I HATE THESE PILLS!!! | F | 67 | 7 days 500 MG 4X D | 6/9/2016 | 4 | prevent infection had lip biopsy | Day 6 into it. Prescribed a total of 2,000mg a daily to prevent infection after a salivary gland/lip biopsy. Two 250mg capsules 4 times a day. No gastro side effects, but within an hour of taking each dose I am peeing like crazy, volume and urgency. I have interstitial cystitis as well, so this is really making the urination frequency off the charts. | F | 51 | 7 days 1000 4X D | 5/21/2016 | 1 | UTI | Extreme GI distress | I must have had an allergic reaction or oversensitivity to this drug. I had taken in the past with no major issues. Was given as treatment for UTI. Took 1st pill and felt fine, for about 2 hours.. then I felt upper abdominal/reflux-like pain that gradually worsened until I began vomiting almost uncontrollably for about 3 hours.. then, it was weird, I could almost feel the pill moving down my GI tract! I then had severe cramping and shooting pains, along with the accompanying diarrhea. In total, the reaction lasted 6 hours. Being a total dope, I thought this was a fluke.. and the next day I took another pill. Well.. the exact same thing happened. My husband wanted to take me to the ER, as it was so severe, but I rode out the 6 hours again, then all was over. I rated it low because of my personal reaction, which does not seem to be norm, but just wanted to report in case someone else experiences the same thing. | F | 59 | 1 days 500mg 2X D | 5/20/2016 | 1 | For sinusitis infections | F | 34 | 4 days 500 m g | 5/4/2016 | 3 | 1X D | 4/24/2016 | 3 | 1 days | 4/24/2016 | 1 | UTI | Extreme fatigue! I was taking 500 mg 4x's a day. Had to stop taking it. Everything I ate which wasn't much had me running to the bathroom. Not good for someone with a history of colitis. I had a lot of anxiety and depression. My heart rate went to the moon. I've never taken this med before and I will never take again. | F | 65 | 4 days 500 mg | 4/23/2016 | 1 | UTI | I was supposed to take it a week, but could not manage. Horrible G.I. effects, diarrhea, stomach pain, bloating, mucous. Insomnia, brain fog, heart palpitations, feelings of despair and anxiety, joint pain, back pain, generally wanting to give up on everything. Headache. Body chills and freezing hands. A wretched experience all in all. People over 50 generally don't do well on this drug. | Two things can help if you are stuck taking this: 1. Magnesium supplement for the heart palpitations, the drug depletes MG.; and 2. a specific probiotic which has Saccharomyces Boulardii in it. Most drug stores and groceries have it mixed in with the usual probiotics. Read the labels and find this--it REALLY helps with Diarrhea and G.I. pain. I will never again take any antibiotic without supplementing with this. | F | 60 | 3 days 500 mg 3X D | 4/23/2016 | 1 | Doesnt matter | Extreme emotions, crying, dizzy Hate everything | Never again!!! Does it have sulfa in it?? I'm allergic to that | F | 41 | 7 days 500 × 3 a | 4/21/2016 | 2 | UTI, Diverticulitis | Prescribed this because original scrip of Cipro and Flagyl gave me 'flying out if my skin' anxiety attacks. First 2 doses were fine, but after 3rd dose noticed headache starting to build. Also felt utterly exhausted and wanted to crawl back in bed. Anxiety attack hit 2hrs after 4th dose. Not as bad as with other meds, but pretty unpleasant. Read that it may stop after I get used to the drug. Just want to get thru the next 5 days so I can get better and never have to take this again. | F | 53 | 2 days 500 | 4/13/2016 | 1 | Infection | Anxiety, depression, suicidal thoughts, felt helpless, confusion, sadness etc. | My 12 year old daughter was prescribed Keflex for an infection. Within a day of taking this her anxiety had increased drastically. After day 2, she had a major panic attack and confessed she was having suicidal thoughts. By nature, she is an anxious person, BUT she's NEVER had a panic attack and certainly had never had such terrible thoughts. She was scared! This drug is horrible. | F | 12 | 14 days 500mg 3X D | 4/10/2016 | 4 | Kidney infection | It's the only antibiotic so far that's got rid of my recurring kidney infections although it caused almost-unbearable pain in my legs, muscles and joints. Pain is so bad I can't walk for the first few days of the course. | Side effects worth it as it's the only one that works for me | F | 18 | 7 days 250mg | 3/30/2016 | 1 | Cyst abscess | Dizziness, blurred vision, extreme fatigue, heat sensations in legs, pain in legs, swelling in stomach and legs, dry mouth, rash | I advised the NP I was sensitive to antibiotics and already had a reaction to another drug in same class. She wanted me to try 2 a day instead of 3. I took 1 the first day since it was late, and then 2 for next 2 days. Alter reading reviews, I ate several yogurts with each dose. On day 3, I was driving and had 30 minutes of feeling like my leg vein was squirting. That has NEVER happened before. Hours later, I have swelling in weird places on my leg. With this and other progressive symptoms, I am scared to take any more. I took 2 Benedryl and called the pharmacy to add this to the allergic list. I will also advise my doctor. The abscess felt better, but I will try something alternative. The cure is causing more severe issues than the cyst. I will not take this med again and advise caution if you are sensitive to meds. | F | 60 | 3 days 500 3X D | 3/25/2016 | 4 | infected cuticle | Extreme fatigue grows stronger after each dose. By day 5 could barely stay awake. Nausea. Lack appetite. Day three hit with diarrhea. Body aches. Day 6 troubles walking legs weak plus all the above. But finger is now fine. I figured there would be side effects. Yep. On to lots of pre and probiotics. i hope this killed off any other infections not detected. Could be some symptoms could be a form of herxheimer reaction. Because this has been a full flu like thing. Now that i know how I react to this drug I Will have it noted in my chart. But will take again If indicated. Not fun but effective. More than I can say for Basid...ugh. | F | 65 | 6 days 500mg 4x d | 3/19/2016 | 1 | Finger Infecrion | After 3 days of taking - had EXTREME MUSCLE AND JOINT ACHES from head to toe - felt like the flu. | Will never take this medicine again - horrible experience / neck, jaw, ribs, hands, stomach, abs, thighs, calves and even toes hurt - felt absolutely awful and broke out in a cold night sweat- stopped immediately when I made the connection | F | 39 | 2 days 500 | 3/11/2016 | 1 | operation | Extreme anxiety. | F | 29 | 5 days 500mg | 3/8/2016 | 5 | Soft tissue infection of skin | Night terrors, anxiety, but was the only drug that cleared my infection. Tried 5 other ones including bactrim ds | M | 43 | 1 months 2,000 mg | 3/5/2016 | 1 | Bronchitis | Itching all over, hives, pain in legs and severe anxiety with hallucinations. How long will the anxiety & hallucinations last????itching & hives took a week to get rid of. Pain in legs 4 days to stop. | I hate this medicine & don't think anyone should take it. | M | 17 | 10 days ?? | 2/23/2016 | 3 | Abscessed Tooth | Severe Vaginal Yeast Infection Manageable abdominal cramping and diarrhea. | Keflex worked wonders on the infection that was creeping around in my gumline from a bad tooth (that was later pulled and replaced). The pain from the infection decreased dramatically in just 1 day. HOWEVER, Keflex also killed all the good bacteria in my vagina, which made it very easy for candida to have a field day in my "lady cocoon". It was the first yeast infection I'd ever had, and I'm 40. It was *terrible*. I strongly encourage anyone (male or female for that matter) to eat yogurt...and lots of it, while taking your course of Keflex. Florajen3 (a probiotic supplement) would also have been good for me to know about prior to this mess. I also strongly encourage any female to wait to have sex until a week after your Keflex course to be on the safe side. Yeast infections are NOT an "STD" but they can be passed to your partner, and trust me...nobody wants it. | F | 10 days 500mg 1X D | 2/3/2016 | 4 | Infected ear piercing | BRUTAL ingestion, nausea and diarrhea, tasted bad, fatigue | My industrial piercing got infected and the whole back of my ear was red and itchy and there was puss in my lower hole. I was forced to take the piercing out and was given this Keflex stuff. The infection got a bit worse before it got better when I first started taking it. It did the job but it was a pain in the butt taking it three times a day. The GI side effects were horrid, but I have a sensitive digestive system. It had a bad taste to it. | F | 20 | 7 days Forgot 3X D | 12/29/2015 | 5 | Fingernail torn off | no side effects, some tiredness, but all anitbiotics make me tired | F | 62 | 7 days 500 4X D | 12/27/2015 | 4 | infection at surgical site | Light constipation | I was surprised I had no issues because usually I do with anti biotics. Difference in infection within 48 hours. | F | 58 | 10 days 500 mg 2X D | 12/20/2015 | 3 | swollen lymph nodes | Hot flashes. Severe dizziness. Heartburn. Nausea and stomach cramps. Always tired while on this medication. | F | 31 | 7 days 500mg 3x d | 12/20/2015 | 5 | impetigo | I didn't have any side affects. It helped with gas problem as well. | F | 30 | 2 weeks 10 times | 12/19/2015 | 3 | Infected laceration | Somewhat normal and my hand is getting better but experiencing some moodiness and heart burn. On 2000mg a day for 7 days. Guess everyone reacts different | F | 22 | 7 days 4x500mg | 12/18/2015 |