# Silver sulfadiazine
**Silver sulfadiazine** (SSD) is a topical antibacterial cream, used at 1% concentration, that combines silver with the sulfonamide antibiotic sulfadiazine; it is applied mainly to prevent and treat infection in burn wounds. It was created in 1968 by Charles L. Fox Jr., who combined silver and sulfadiazine into a 1% hydrosoluble cream that became a leading agent in the topical treatment of burns[1](https://pubmed.ncbi.nlm.nih.gov/12070926/). It was the first metal complex of a sulfonamide to be used in the clinic as a topical agent for burn patients and remains in wide use today[2](https://www.sciencedirect.com/science/article/pii/S0010854523002175).
| Key fact | Detail |
|---|---|
| Composition | 1% silver sulfadiazine cream, a combination of silver and the sulfonamide sulfadiazine, introduced by Fox in 1968[1](https://pubmed.ncbi.nlm.nih.gov/12070926/) |
| Main use | Prophylaxis and treatment of infection in second- and third-degree burns, leg ulcers, and pressure ulcers[3](https://www.ncbi.nlm.nih.gov/books/NBK487400/pdf/Bookshelf_NBK487400.pdf) |
| Mechanism | Slow release of silver ions (Ag+) as the primary biocide; sulfadiazine keeps Ag+ in solution and prevents black colloidal silver formation on the skin[4](https://academic.oup.com/jimb/article/33/7/627/5993001?searchresult=1) |
| Application | Clean the wound, then apply a 3 to 5 mm layer once daily under sterile conditions, covered with sterile dressings; prescription under medical supervision[5](https://medicalguidelines.msf.org/sites/default/files/pdf/guideline-339-en.pdf) • [6](https://dailymed.nlm.nih.gov/dailymed/getFile.cfm?setid=1cfe8e5a-8951-acea-e063-6394a90a1811&type=pdf) |
| Adverse effects | Leukocytopenia, methemoglobinemia, silver deposition, and allergic reaction to sulfonamides, particularly with application to extensive burns[7](https://pmc.ncbi.nlm.nih.gov/articles/PMC13555136/) |
| Contraindications | Sulfa hypersensitivity, newborn infants, low-birthweight babies; use limited to under 2 weeks and not in babies under 2 months[3](https://www.ncbi.nlm.nih.gov/books/NBK487400/pdf/Bookshelf_NBK487400.pdf) |
| Evidence status | Systematic reviews find newer dressings heal burns faster than SSD, with no clear infection advantage for SSD[8](https://pubmed.ncbi.nlm.nih.gov/27126813/) • [9](https://pubmed.ncbi.nlm.nih.gov/29903603/) |
## Background in burn care
Silver compounds have a long history in wound treatment. [Silver nitrate](https://www.edgepedia.org/silver-nitrate) was used topically throughout the 1800s for burns, ulcerations, and infected wounds, and its use declined after World War II with the arrival of antibiotics[10](https://journals.sagepub.com/doi/10.1089/sur.2011.097). In 1965 Carl Moyer revived interest in silver nitrate solution, concluding from in vitro and in vivo studies that a 0.5% solution was the lowest concentration with antibacterial action against *Staphylococcus aureus*, hemolytic streptococci, *Pseudomonas aeruginosa*, and *E. coli*[11](https://pubmed.ncbi.nlm.nih.gov/10716355/). Mafenide acetate was introduced shortly afterward, followed a few years later by silver sulfadiazine, so that three medicaments appeared in a short period and changed topical burn treatment radically[11](https://pubmed.ncbi.nlm.nih.gov/10716355/).
Fox's preparation proved powerfully antibacterial, raised survival among severely burned patients, and, according to reports, caused less tissue damage than silver nitrate[12](https://www.sciencedirect.com/science/article/abs/pii/S0305417916300560). Silver sulfadiazine quickly became the drug of choice for burns[4](https://academic.oup.com/jimb/article/33/7/627/5993001?searchresult=1), and despite attempts to develop more effective silver compounds it remains the most widely used substance of this type[11](https://pubmed.ncbi.nlm.nih.gov/10716355/).
## Chemistry and mechanism of action
Silver sulfadiazine is a coordination complex of silver with sulfadiazine, a sulphonamide antibiotic. In the cream, the sulfadiazine does not act primarily as an antibacterial agent in its own right; it has been reported to show a synergistic effect with subinhibitory levels of silver[12](https://www.sciencedirect.com/science/article/abs/pii/S0305417916300560). Analysis of the combination suggests that the slow release of Ag+ serves as the primary biocide, while sulfadiazine mostly keeps Ag+ in solution and prevents the light-sensitive formation of black colloidal Ag0 on the skin surface, a cosmetic problem that had affected patients treated with silver nitrate products[4](https://academic.oup.com/jimb/article/33/7/627/5993001?searchresult=1).
Because an emulsion base is used, silver sulfadiazine preparations have high tissue permeability and are expected to promote debridement by autolysis of necrotic tissue[7](https://pmc.ncbi.nlm.nih.gov/articles/PMC13555136/).
## Clinical use
Silver sulfadiazine cream is used for prophylaxis and treatment of infection in severe burns, and in cream and impregnated-dressing forms for second- and third-degree burns, leg ulcers, and pressure ulcers[5](https://medicalguidelines.msf.org/sites/default/files/pdf/guideline-339-en.pdf) • [3](https://www.ncbi.nlm.nih.gov/books/NBK487400/pdf/Bookshelf_NBK487400.pdf). The wound is cleansed and debrided, and the cream is applied under sterile conditions; treatment continues until satisfactory healing has occurred or the burn site is ready for grafting[6](https://dailymed.nlm.nih.gov/dailymed/getFile.cfm?setid=1cfe8e5a-8951-acea-e063-6394a90a1811&type=pdf). For children 2 months and over and adults, guidelines specify a 3 to 5 mm layer applied once daily and covered with sterile compresses, under medical supervision[5](https://medicalguidelines.msf.org/sites/default/files/pdf/guideline-339-en.pdf).
Two practical limits shape its use. In extensive burns with a large amount of exudate, silver sulfadiazine is reported to be inactivated with a marked decrease in effect, so repeated applications are needed[7](https://pmc.ncbi.nlm.nih.gov/articles/PMC13555136/). Because silver's cytotoxicity can delay healing, some clinicians avoid it for wounds with actively proliferating epidermal cells, such as donor sites and superficial second-degree burns[7](https://pmc.ncbi.nlm.nih.gov/articles/PMC13555136/).
For very large burns, SSD alone has limits: it does not offer sufficient protection against gram-negative bacteria in patients with burns covering more than 50% of body surface, and Monafo introduced a combined preparation of silver sulfadiazine with cerium nitrate for this setting[11](https://pubmed.ncbi.nlm.nih.gov/10716355/).
## Adverse effects and precautions
Reported adverse effects are leukocytopenia, methemoglobinemia, silver deposition, and allergic reaction to sulfonamides, and particular attention is needed when the cream is applied to extensive burns[7](https://pmc.ncbi.nlm.nih.gov/articles/PMC13555136/). Leukocytopenia also occurs with other drugs, and some authors hold that it should not be regarded as a side effect specific to silver sulfadiazine[7](https://pmc.ncbi.nlm.nih.gov/articles/PMC13555136/). Systemic sulfonamide effects, including hematological, renal, and cutaneous disorders, can occur when the cream is applied to a large surface area, to mucous membranes, or for prolonged periods[5](https://medicalguidelines.msf.org/sites/default/files/pdf/guideline-339-en.pdf).
The drug is contraindicated in patients with a history of sulfa hypersensitivity, in newborn infants, and in low-birthweight babies[3](https://www.ncbi.nlm.nih.gov/books/NBK487400/pdf/Bookshelf_NBK487400.pdf). British Pharmaceutical Codex-style guidance limits use to no longer than 2 weeks, avoids use in babies younger than 2 months, and calls for supervision in patients with liver or kidney disease and in those who are pregnant or breastfeeding[3](https://www.ncbi.nlm.nih.gov/books/NBK487400/pdf/Bookshelf_NBK487400.pdf).
## Evidence on effectiveness
For more than 40 years SSD was referred to as standard therapy, and often as "the gold standard", for the conservative treatment of partial-thickness burns because of its antibacterial properties and wide availability[12](https://www.sciencedirect.com/science/article/abs/pii/S0305417916300560). More recent systematic reviews have qualified that standing.
A 2016 systematic review of randomized trials comparing SSD with newer burn dressings found that many dressings showed superior healing, while no dressing showed a clear benefit over SSD regarding infection; the authors concluded that the standard use of SSD in conservative treatment of burn wounds can no longer be supported[8](https://pubmed.ncbi.nlm.nih.gov/27126813/).
A 2018 meta-analysis of 24 randomized trials found that silver dressings healed burns a mean 3.83 days faster than SSD (95% CI 2.03 to 5.62) and dressings without silver 2.9 days faster (95% CI 0.81 to 5.00); infection rates were significantly higher with SSD than with non-silver dressings, but did not differ between SSD and newer silver materials[9](https://pubmed.ncbi.nlm.nih.gov/29903603/).
A 2022 Cochrane review of 26 trials involving 2066 participants concluded there is insufficient evidence that silver-containing dressings or creams promote wound healing or prevent wound infection, and that some evidence from small, poor-quality studies suggests SSD has no effect on infection and actually slows healing in patients with partial-thickness burns[13](https://www.cochrane.org/evidence/CD006478_probable-silver-containing-dressings-and-creams-do-not-prevent-wound-infection-or-promote-healing).
Trials also document the practical burden of cream treatment: in comparisons of superficial partial-thickness burns, SSD required roughly 12 to 19 dressing changes per patient versus 2 to 7 for silver-containing occlusive dressings, with higher pain scores and higher treatment costs for SSD in several comparisons[14](https://journals.cambridgemedia.com.au/download_file/11564/3096).
## Place in current practice
Despite the comparative evidence, silver sulfadiazine remains in wide clinical use[2](https://www.sciencedirect.com/science/article/pii/S0010854523002175). A 2016 review concluded that some newly developed non-silver burn dressings heal faster than SSD, but that SSD remains an alternative when treatment with more modern dressings is not an option[12](https://www.sciencedirect.com/science/article/abs/pii/S0305417916300560). Its cream form is comfortable for patients, with an analgesic and refreshing effect and less painful dressing changes than antiseptic-impregnated dressings, although French health technology assessment notes this benefit still remains to be demonstrated[15](https://www.has-sante.fr/upload/docs/application/pdf/2022-02/flammazine_21042021_summary_ct18567.pdf). Japanese burn guidelines also list topical silver sulfadiazine among agents to consider for removing necrotic tissue when surgical debridement is not possible[7](https://pmc.ncbi.nlm.nih.gov/articles/PMC13555136/).
## References
1. [Topical agents used in the treatment of burns, PubMed](https://pubmed.ncbi.nlm.nih.gov/12070926/)
2. [Beyond silver sulfadiazine: metal complexes of sulfonamides in medicinal inorganic chemistry, Inorganic Chemistry Communications](https://www.sciencedirect.com/science/article/pii/S0010854523002175)
3. [Silver sulfadiazine, StatPearls / NCBI Bookshelf](https://www.ncbi.nlm.nih.gov/books/NBK487400/pdf/Bookshelf_NBK487400.pdf)
4. [Silver as biocides in burn and wound dressings and bacterial resistance to silver compounds, Journal of Industrial Microbiology and Biotechnology](https://academic.oup.com/jimb/article/33/7/627/5993001?searchresult=1)
5. [Silver sulfadiazine cream, MSF Medical Guidelines](https://medicalguidelines.msf.org/sites/default/files/pdf/guideline-339-en.pdf)
6. [SSD (1% Silver Sulfadiazine Cream) label, DailyMed](https://dailymed.nlm.nih.gov/dailymed/getFile.cfm?setid=1cfe8e5a-8951-acea-e063-6394a90a1811&type=pdf)
7. [Wound, Pressure Ulcer, and Burn Guidelines 2023-6: Management of Burns, Third Edition](https://pmc.ncbi.nlm.nih.gov/articles/PMC13555136/)
8. [Heyneman A et al. (2016). The role of silver sulphadiazine in the conservative treatment of partial thickness burn wounds: a systematic review, Burns](https://pubmed.ncbi.nlm.nih.gov/27126813/)
9. [Comparative study of Silver Sulfadiazine with other materials for healing and infection prevention in burns: systematic review and meta-analysis, PubMed](https://pubmed.ncbi.nlm.nih.gov/29903603/)
10. [Politano AD et al. (2013). Use of Silver in the Prevention and Treatment of Infections: Silver Review, Surgical Infections](https://journals.sagepub.com/doi/10.1089/sur.2011.097)
11. [Klasen HJ (2000). A historical review of the use of silver in the treatment of burns. II. Renewed interest for silver, Burns](https://pubmed.ncbi.nlm.nih.gov/10716355/)
12. [The role of silver sulphadiazine in the conservative treatment of partial thickness burn wounds, ScienceDirect](https://www.sciencedirect.com/science/article/abs/pii/S0305417916300560)
13. [Storm-Versloot MN et al. (2022). Topical silver for preventing wound infection, Cochrane Database of Systematic Reviews](https://www.cochrane.org/evidence/CD006478_probable-silver-containing-dressings-and-creams-do-not-prevent-wound-infection-or-promote-healing)
14. [Systematic review of silver dressing comparisons, Cambridge Media](https://journals.cambridgemedia.com.au/download_file/11564/3096)
15. [FLAMMAZINE (silver sulfadiazine) transparency opinion, HAS Santé](https://www.has-sante.fr/upload/docs/application/pdf/2022-02/flammazine_21042021_summary_ct18567.pdf)
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*Topic: Encyclopedia › Life and health › Human health and medicine › Medicines and therapeutics › Anti-infective drugs and resistance › Antibacterial drugs*
*Initially written Sep 17, 2026 · Reviewed: Sep 17, 2026; Oct 21, 2026 · Edited: Oct 15, 2026; Oct 21, 2026 · Last review: Oct 21, 2026*
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License: Edgepedia Community License 1.0, https://www.edgepedia.org/edgepedia/license