Podiatry

Foot issues such as warts, athlete’s foot, and nail infections may be helped with compounded medications. Penetrant enhancers can be added to improve the absorption of topically applied medications. Numerous compatible medications can be combined into a single dosage form for ease of administration. Also, a synergistic effect can result when certain medications are used concomitantly.

The following list is just a few of the preparations that we can compound for podiatry. We work together with prescriber and patient to solve problems, and all formulations are customized per prescription to meet the unique needs of each patient. Therapeutic results depend not only on the selection of drug, but also the use of a proper base and preparation technique. Please contact our compounding pharmacist to discuss the dosage form, strength, and medication or combination that is most appropriate for your patient.

  • Clotrimazole in DMSO solution
  • Dexamethasone iontophoresis solution
  • Fluconazole/Ibuprofen topical gel
  • Ketamine/Gabapentin transdermal gel
  • Ketoprofen 10% topical gel
  • KOH solution: 5% and 10%
  • Phenytoin topical
  • Urea 40% ointment

Wounds and pressure sores may heal more quickly if treated with topical phenytoin. Medications which improve capillary blood flow can be added to a compounded medication to enhance circulation at the wound margins and promote healing of the injured area.

Topical Phenytoin for Wound Healing

The stimulatory effect of orally administered phenytoin on gingival tissue prompted its assessment in wound healing. Phenytoin may promote wound healing by a number of mechanisms, including stimulation of fibroblast proliferation, facilitation of collagen deposition, glucocorticoid antagonism, and antibacterial activity. Phenytoin has been used topically in the healing of pressure sores, venous stasis and diabetic ulcers, traumatic wounds, skin autograft donor sites, and burns.

Rhodes et al compared the healing of stage II decubitus ulcers with topically applied phenytoin and two other standard topical treatment procedures in 47 patients in a long-term care setting. Ulcers were examined for the presence of healthy granulation tissue, reduction in surface dimensions, and time to healing. Topical phenytoin therapy resulted in a shorter time to complete healing and formation of granulation tissue when compared with DuoDerm dressings or triple antibiotic ointment applications. The mean time to healing in the phenytoin group was 35.3 +/- 14.3 days compared with 51.8 +/- 19.6 and 53.8 +/- 8.5 days for the DuoDerm and triple antibiotic ointment groups, respectively. Healthy granulation tissue in the phenytoin group appeared within 2 to 7 days in all subjects, compared to 6 to 21 days in the standard treatment groups. The phenytoin-treated group showed no detectable serum phenytoin concentrations.

Anstead et al. described a patient with a massive grade IV pressure ulcer that was unresponsive to conventional treatment, yet responded rapidly to treatment with topical phenytoin. Song and Cheng reported phenytoin improved wound breaking strength in normal and radiation-impaired wounds. The results of their study indicated that topical phenytoin accelerated normal and irradiation-impaired wound healing by increasing the number of wound macrophages and improving the macrophage function. Pendse et al evaluated the effectiveness of topical phenytoin in healing chronic skin ulcers in a controlled trial of 75 inpatients. At the end of the fourth week, 29 of 40 phenytoin-treated ulcers had healed completely versus 10 of 35 controls. They concluded: “topical phenytoin appears to be an effective, inexpensive, and widely available therapeutic agent in wound healing.”

The effectiveness of topical phenytoin as a wound healing agent was compared with that of OpSite and a conventional topical antibiotic dressing (Soframycin) in a controlled study of 60 patients with partial-thickness skin autograft donor sites on the lower extremities. Mean pain scores were lower and mean time to complete healing (complete epithelialization) was best in the phenytoin-treated group (6.2 +/- 1.6 days).  Topical phenytoin compared very favorably with, and in some aspects was superior to, occlusive dressings.

The efficacy of topical phenytoin in the treatment of diabetic foot ulcers was evaluated in a controlled inpatient study. Fifty patients were treated with topical phenytoin, and 50 patients received dry sterile occlusive dressings. Both groups improved, but the ulcers treated with topical phenytoin healed more rapidly. Mean time to complete healing was 21 days with phenytoin and 45 days with control.

No study reported any significant adverse effects secondary to topical phenytoin therapy.

Iontophoresis facilitates delivery of medications into the tissues beneath the skin by electronic transport of ionized drugs in solution. Acetic acid iontophoresis is effective in the treatment of heel pain. Iontophoresis of dexamethasone for plantar fasciitis should be considered when more immediate results are needed. Iontophoresis has also been used to successfully treat plantar hyperhidrosis.

Phonophoresis is a technique that combines topical drug therapy with ultrasound to achieve therapeutic drug concentrations in muscle and other tissues beneath the skin. Ultrasound gels can be formulated to contain medications such as anti-inflammatories and/or anesthetics.

Plantar warts and Palmer warts are common, especially in children. These warts are named for where they appear on the body. Palmer warts occur on the hands, and plantar warts on the bottom of the foot.

Virtually everyone will have a wart (or several) someplace at some time in their lives.

Plantar warts and palmer warts are noncancerous skin growths, caused by a viral infection in the top layer of the skin. The culprit is a strain of virus called human papillomavirus or HPV. Many strains of the virus exist, and those that cause common warts on the hands and feet are not the same strains of HPV that cause genital warts.

The following article concluded: “sodium salicylate iontophoresis appeared to compare favorably with other office-based interventions in diminishing the size of plantar warts and their associated pain. Application of iontophoresis to weight-bearing surfaces in some subjects appeared to decrease the pain and scarring associated with freezing and electrocautery and the fixation problems associated with medicated patches.”

Management of onychomycosis, a fungal infection of the fingernails and toenails, usually consists of systemic antifungal medications, topical therapy (e.g., urea ointment, desiccating solutions, keratolytics, vital dyes), or surgical intervention (e.g., nail plate avulsion, laser therapy). Topical prescription antifungal preparations, containing the active ingredient of your choice, may be less likely to cause the serious systemic side effects that can occur with oral antifungal therapy and can provide a more economical alternative, as lower doses are needed when the medication is applied topically at the site. Penetrant enhancers can be included in the preparation to improve the effectiveness of topical antifungals.

Although surgical excision is the most popular method for removing nails, the use of concentrated urea plasters applied under occlusion may be superior. The use of urea plasters has inherent advantages – they are inexpensive, several nails can be treated in one session, and the procedure is essentially painless. Various synergistic combinations and topical medications with penetrant enhancers can be compounded for antifungal therapy. Topical medications usually have a lower adverse drug-reaction profile than systemic medications.

Resistant warts and molluscum contagiosum have been treated successfully with compounded topical medications, avoiding discomfort associated with freezing, scraping, electrocautery and laser therapy.

The following study found that 5% KOH aqueous solution proved to be as effective and less irritating when compared to the 10% KOH solution. This trial also emphasizes the effectiveness of topical KOH in the treatment of molluscum contagiosum, sparing affected children from more aggressive physical modalities of treatment.

Neuropathic Foot Cream

The following testimonial appeared in the December 1999 issue of Neuropathy News, a patient newsletter.

“My local [compounding pharmacist] has created a cream to help alleviate the pain of foot neuropathy. It reduces the burning and sharp, needle-like pain. All you need is a very thin coat. The directions call for using it four times a day, but I find it particularly helpful at night. [The formulation contains] 2% amitriptyline and 2% baclofen in a transdermal gel.”

Compounding pharmacists have the unique training and ability to create medications that address the individual needs of patients. One of the most helpful products they use are transdermal gels that allow for the passage of medication directly through the tissue into the area of pain. Many of the medications typically prescribed for neuropathy patients such as amitriptyline, lidocaine, mexilitene, ketamine and [gabapentin] can cause significant side effects when taken orally. Transdermal gel minimizes systemic side effects and maximizes local pain relief. Compounding pharmacists have many resources that offer relief from neuropathic pain.

In Diabetes Interviews, January 2000, Neil A. Burrell, DPM, CDE, of Beaumont, Texas, wrote: “we have a very high success rate using amitriptyline and baclofen mixed in a gel component. This compound is applied to the feet three times per day, and offers immediate relief… [For] recalcitrant neuropathic pain, many times we use a combination of tramadol, gabapentin and amitriptyline.”

At our compounding pharmacy, we work together with physicians and patients to prepare formulations containing the medications and doses that are most appropriate to meet each patient’s specific needs. Let us know how we can be of service.

Topical Doxepin

Topical doxepin could be an alternative and relatively safe treatment in alleviating neuropathic pain in the diabetic patient, especially when the use of systemic treatment is contraindicated. In the following case study, the soles of the patient’s feet were treated with topical doxepin 5% twice daily for four weeks. The patient responded dramatically with loss of the severe burning sensation and no side effects reported.

Various synergistic combinations are used for antifungal therapy. Research points to the practicality “of using ibuprofen, alone or in combination with azoles, in the treatment of candidosis, particularly when applied topically, taking advantage of the drug’s antifungal and anti-inflammatory properties.”

Some topical non-steroidal drugs are available without prescription and are widely advertised for acute and chronic painful conditions. There are 20–24 million prescriptions (predominantly oral) for non-steroidal anti-inflammatory drugs in the United Kingdom each year, 5% of the NHS total prescriptions. The attributable risk of going to hospital with gastrointestinal problems is 1.3 to 1.6% annually for regular users of oral non-steroidals. This raises the question of whether for some patients using oral non-steroidal anti-inflammatory drugs is worse than the disease. Despite licensed status, there is skepticism that topical non-steroidal anti-inflammatory drugs have any action other than as rubefacients.

The following article concludes: “Topical non-steroidal anti-inflammatory drugs are effective in relieving pain in acute and chronic conditions.”

BMJ. 1998 Jan 31;316(7128):333-8

The following article reports “The systemic concentrations of ketoprofen have also been found to be 100-fold lower compared to tissue concentrations below the application site in patients undergoing knee joint surgery. Topically applied ketoprofen thus provides high local concentration below the site of application but lower systemic exposure.”

Pharm Res. 1996 Jan;13(1):168-72