Great question! Both methotrexate and biologic medications affect the immune system, so both carry a risk of infections. Here's a breakdown of how their side effects compare:
Methotrexate side effects (common):
- Fatigue
- Nausea, vomiting, and diarrhea
- Headaches
- Hair loss
- Mouth sores
- Mild skin rash
Methotrexate Show Full Answer
Great question! Both methotrexate and biologic medications affect the immune system, so both carry a risk of infections. Here's a breakdown of how their side effects compare:
Methotrexate side effects (common):
- Fatigue
- Nausea, vomiting, and diarrhea
- Headaches
- Hair loss
- Mouth sores
- Mild skin rash
Methotrexate side effects (more serious):
- Liver and kidney damage (especially with long-term use)
- Bone marrow suppression (low blood cell counts)
- Lung inflammation
- Fever, sore throat, or unexpected bruising/bleeding Biologic side effects (usually milder):
- Injection site irritation
- Headache
- Cold or flu-like symptoms
- Urinary tract infections
Biologic side effects (seek immediate care if you notice):
- A rash spreading across the body
- Chills or shaking
- Shortness of breath
- Itchy eyes or lips One important thing to note — long-term methotrexate use can increase the risk of liver damage, especially if alcohol is consumed regularly. Doctors typically monitor kidney and liver function through routine blood tests.
Folic acid is usually prescribed alongside methotrexate to help reduce some side effects.
Biologics tend to have a milder side effect profile overall, but they can be significantly more expensive depending on insurance coverage. Always discuss the risks and benefits with your dermatologist to find what works best for your situation.
August 17
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