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Cephalexin (Keflex) is an antibiotic used to treat bacterial infections. It is a cephalosporin antibiotic, which works by killing bacteria. The most common side effects of cephalexin include diarrhea, nausea, and stomach pain. Other possible side effects are headache, fatigue, dizziness, and vaginal yeast infections. While rare, serious side effects include seizures, C. diff diarrhea, and an increased risk of bleeding. In addition, cephalexin may cause muscle weakness and fatigue in some individuals, which could potentially be linked to a more serious underlying condition.
| Characteristics | Values |
|---|---|
| Common side effects | Diarrhea, nausea, stomach pain, headache, fatigue, dizziness, seizures, vaginal yeast infections |
| Serious side effects | Infectious diarrhea, bleeding, allergic reactions, anaphylaxis, interstitial nephritis, hemolytic anemia, serum sickness, SJS, TEN |
| Less common side effects | Muscle weakness, fast heart rate, anxiety, abdominal pain, constipation, insomnia, nightmares, metallic taste, blurred vision, leg pain, back pain, joint pain, rash, genital pruritus, genital candidiasis, vulvovaginitis/vaginitis, vaginal discharge |
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What You'll Learn
- Keflex (cephalexin) is an antibiotic used to treat bacterial infections
- Common side effects include diarrhoea, nausea, and stomach pain
- Cephalexin may cause fatigue, dizziness, and muscle weakness
- Serious allergic reactions are rare but possible, including anaphylaxis
- It is important to consult a doctor if any side effects occur and persist
Keflex (cephalexin) is an antibiotic used to treat bacterial infections
Cephalexin, sold under the brand name Keflex, is an antibiotic used to treat bacterial infections. It belongs to a class of antibiotics called cephalosporins, which work by killing bacteria. Cephalexin is commonly used to treat infections of the bone, skin, ears, genitals, and urinary tract. It is also effective against certain respiratory tract infections, including pneumonia.
As with any medication, cephalexin can cause side effects. The most commonly reported side effects include diarrhea, nausea, and stomach pain. Other possible side effects include headache, fatigue, dizziness, and vaginal yeast infections. In rare cases, cephalexin may cause more severe side effects, such as seizures, C. diff diarrhea, and an increased risk of bleeding. Allergic reactions to cephalexin are also possible, ranging from common allergic reactions such as hives and angioedema to more severe anaphylactic reactions.
It is important to note that the side effects of cephalexin are typically mild and often resolve once the medication course is completed. However, if side effects persist or become bothersome, it is recommended to consult a healthcare professional. Additionally, individuals taking cephalexin should be vigilant for signs of serious allergic reactions, such as swelling, trouble breathing, abdominal pain, and dizziness from low blood pressure, as these require immediate emergency medical attention.
While cephalexin is generally well-tolerated, it may interact with certain medications, including blood thinners, oral contraceptives, and specific antibiotics and antivirals. Therefore, it is crucial to disclose your complete medication history to your healthcare provider before taking cephalexin. Furthermore, individuals with a history of seizures, liver disease, or gastrointestinal diseases should use cephalexin with caution and under medical supervision.
Overall, cephalexin (Keflex) is a valuable antibiotic option for treating various bacterial infections. When used appropriately and under medical guidance, it can effectively treat infections while managing any associated side effects.
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Common side effects include diarrhoea, nausea, and stomach pain
Cephalexin (Keflex) is an antibiotic used to treat bacterial infections such as pneumonia and respiratory tract infections, as well as infections of the bone, skin, ears, genitals, and urinary tract. While it is generally well-tolerated, it can cause several side effects, including common ones like diarrhoea, nausea, and stomach pain.
Diarrhoea is a well-documented side effect of cephalexin, and in some cases, it can be severe. It is important to note that diarrhoea medicines may worsen the condition or prolong it. Therefore, it is advised to consult a doctor before taking any medication to treat diarrhoea. In addition to diarrhoea, nausea is another common side effect of cephalexin. This can be managed by taking the medication with food, as an empty stomach can induce nausea and even vomiting.
Stomach pain, or abdominal pain, is also frequently reported by those taking cephalexin. This can be related to a C. diff infection, which is characterised by severe stomach pain, fever, and cramping. If these symptoms occur, immediate medical attention is advised. Furthermore, stomach upset can be mitigated by taking the medication with food.
While not as prevalent as the previously mentioned side effects, muscle weakness and fatigue have also been reported by some individuals taking cephalexin. In rare cases, severe fatigue could indicate a more serious side effect, such as a decrease in red blood cell count. Therefore, it is important to consult a healthcare professional if you experience persistent or severe fatigue or muscle weakness while taking cephalexin.
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Cephalexin may cause fatigue, dizziness, and muscle weakness
Cephalexin is an antibiotic used to treat bacterial infections. It belongs to a class of antibiotics called cephalosporins and works by killing bacteria. It is used to treat infections such as pneumonia, respiratory tract infections, bone infections, skin infections, ear infections, genital infections, and urinary tract infections.
While cephalexin is effective in treating these infections, it may cause some unwanted side effects. One of the most commonly reported side effects of cephalexin is diarrhea, which can sometimes be severe. Other common side effects include nausea, vomiting, abdominal pain, and gastritis. In rare cases, cephalexin may cause more serious side effects, such as seizures, C. diff diarrhea, and an increased risk of bleeding.
Additionally, cephalexin may cause fatigue, dizziness, and muscle weakness. Fatigue is a known side effect of cephalexin, with some individuals reporting extreme tiredness and weakness while taking the medication. Dizziness is another possible side effect, which may be related to low blood cell levels. It is important to stay hydrated and avoid activities that require coordination if you experience dizziness.
Muscle weakness is not specifically listed as a common side effect of cephalexin in the sources provided, however, one individual report mentions experiencing muscle weakness, among other side effects, after taking cephalexin. It is important to note that side effects can vary from person to person, and not everyone will experience the same effects.
If you are experiencing muscle weakness or any other bothersome side effects while taking cephalexin, it is important to consult your healthcare provider. They can provide guidance on managing side effects and determine if any further action is necessary.
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Serious allergic reactions are rare but possible, including anaphylaxis
Cephalexin (Keflex) is an antibiotic used to treat bacterial infections. It is generally considered safe for adults and children, including older adults, pregnant and breastfeeding women, and infants. However, it is always important to consult a doctor or healthcare professional before taking any new medication.
While most side effects of cephalexin are mild and can be managed at home, serious allergic reactions are possible, albeit rare. These allergic reactions can manifest as urticaria and angioedema, with symptoms such as a skin rash, hives, itching, red eyes, and swelling of the mouth, face, lips, tongue, or throat. In some cases, anaphylaxis may occur, requiring emergency medical attention.
Other signs and symptoms of a severe allergic reaction to cephalexin include:
- Trouble breathing or swallowing
- Wheezing or tightness in the chest or throat
- Unusual hoarseness
- Flu-like symptoms
- Fever, chills, or sore throat
- Yellowing of the skin or eyes (jaundice)
- Dark urine
- Decreased appetite
- Upset stomach or stomach pain
- Light-colored stools
- Vomiting
- Feeling very tired, weak, or confused
- Hallucinations
If you experience any of these symptoms, seek immediate medical attention. It is important to inform your doctor or healthcare provider if you have any known allergies before taking cephalexin or any other medication.
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It is important to consult a doctor if any side effects occur and persist
Cephalexin, the active ingredient in Keflex, may cause some unwanted effects. Although not all of these side effects may occur, if they do occur, they may need medical attention.
Some common side effects of cephalexin include diarrhea, nausea, and stomach pain. Headache, fatigue, dizziness, and vaginal yeast infections are also possible. While most cephalexin side effects are mild, some individuals have reported experiencing muscle weakness, muscle pain, and extreme fatigue. If you experience severe or persistent muscle weakness, particularly upon waking, it is important to consult a healthcare professional.
Serious allergic reactions to cephalexin are rare but possible. Symptoms of an allergic reaction may include large, hive-like swelling on the face, eyelids, lips, tongue, throat, hands, legs, feet, or genitals. Anaphylaxis, a life-threatening allergic reaction, can also occur, requiring immediate emergency medical attention.
In addition to allergic reactions, severe cephalexin side effects may include seizures, C. diff diarrhea, and an increased risk of bleeding. If you experience any severe or persistent side effects, including muscle weakness, it is important to consult a doctor promptly.
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Frequently asked questions
Keflex is an antibiotic used to treat bacterial infections. It is also known by its generic name, cephalexin.
The most common side effects of Keflex include diarrhoea, nausea, stomach pain, headache, fatigue, dizziness, and vaginal yeast infections. More rarely, it can cause seizures, C. diff diarrhoea, and an increased risk of bleeding.
Yes, muscle weakness is a possible side effect of Keflex. Other side effects include muscle pain, joint pain, and back pain.
If you experience any side effects from Keflex, you should consult your doctor or healthcare provider. They may advise you to adjust your dosage or provide other guidance to mitigate the side effects. It is important to continue taking the medication as prescribed, but if the side effects are severe or persist for an extended period, seek medical attention.
