Common Side Effects of Sivextro
Sivextro (tedizolid phosphate), an antibiotic for acute bacterial skin infections and pneumonia, most often causes nausea (around 6-9% of patients), headache (5-6%), diarrhea (4-5%), dizziness (3-4%), and vomiting (2-3%). These are usually mild and resolve without stopping treatment.[1][2]
Serious Side Effects and Warnings
Rare but serious risks include:
- Clostridium difficile-associated diarrhea: Can occur up to two months after treatment due to gut bacteria disruption.
- Myelosuppression: Low blood cell counts (anemia, neutropenia, thrombocytopenia), especially with longer use or in patients with blood disorders; monitor blood tests weekly if treatment exceeds 14 days.
- Hypersensitivity reactions: Rash, itching, swelling, or severe anaphylaxis.
- Peripheral/optic neuropathy: Nerve damage causing numbness, tingling, or vision changes with prolonged exposure.
- Superinfections: Fungal or resistant bacterial infections from microbiome changes.
Avoid in patients with hypersensitivity to tedizolid or linezolid. Use caution in those with liver impairment or on serotonergic drugs due to MAO inhibitor effects risking serotonin syndrome.[1][2][3]
Side Effects in Specific Groups
Pregnant or breastfeeding patients: Limited data; animal studies show fetal harm at high doses. Not recommended unless benefits outweigh risks.[1]
Pediatric use: Approved for skin infections in ages 12+ weighing at least 50kg; safety similar to adults but monitor growth.[3]
Elderly: Higher risk of low blood pressure or falls from dizziness.[2]
How Side Effects Compare to Vancomycin
Sivextro has fewer GI issues and no need for renal dosing adjustments versus vancomycin, but carries unique blood and nerve risks. Shorter 6-day course for skin infections reduces overall exposure.[1][3]
Sources
[1] Sivextro Prescribing Information (Merck)
[2] Drugs.com - Sivextro Side Effects
[3] FDA Label for Sivextro