Cyclosporine is an immunosuppressive medication used to manage autoimmune conditions and to prevent organ-transplant rejection. It belongs to the class of calcineurin inhibitors and is available in pill form in strengths of 25 mg, 50 mg, and 100 mg. In Hong Kong, cyclosporine is a prescription-only drug and is regulated by the Department of Health. Commercially, the same active ingredient is marketed under brand names such as Neoral, Sandimmune, and Gengraf.
Cyclosporine suppresses the immune system by binding to the intracellular protein cyclophilin in T-lymphocytes. This complex inhibits the enzyme calcineurin, which is essential for activating the transcription factor NF-AT (nuclear factor of activated T-cells). As a result, the production of interleukin-2 and other cytokines is reduced, preventing T-cell activation and proliferation.
By dampening the immune response, cyclosporine helps the body accept transplanted organs and reduces the inflammatory activity that drives certain autoimmune skin and joint diseases.
FDA/EMA-approved indications (relevant to Hong Kong):
These uses are supported by clinical trials demonstrating reduced graft loss and improvement in skin lesions, respectively.
Typical patient populations:
If you are considering cyclosporine for a condition not listed here, the medication would be an off-label use.
These applications are not approved by regulatory agencies for Hong Kong; they require careful medical supervision and risk-benefit assessment.
Disclaimer: Off-label use requires medical supervision and individualized risk assessment.
If any of these conditions apply, a healthcare provider must evaluate suitability before initiating therapy.
Major interactions:
CYP3A4 inhibitors (e.g., ketoconazole, erythromycin, clarithromycin) can raise cyclosporine levels → risk of toxicity.
CYP3A4 inducers (e.g., rifampin, phenytoin, carbamazepine) can lower concentrations → risk of graft rejection or treatment failure.
Moderate interactions:
Non-steroidal anti-inflammatory drugs (NSAIDs) may increase nephrotoxic potential.
Macrolide antibiotics may modestly elevate levels; monitor renal function.
Patients should provide a complete medication list, including over-the-counter drugs and herbal supplements, to their prescriber.
Standard dosing (adults):
Transplant prophylaxis: Typical starting dose 5 mg/kg per day in two divided doses; maintenance 3-5 mg/kg per day, adjusted to target trough level (usually 100-250 ng/mL).
Severe psoriasis: Often 2.5 mg/kg per day in two divided doses; some clinicians use a fixed dose of 100-200 mg/day, tailored to response and tolerability.
Available strengths: 25 mg, 50 mg, and 100 mg tablets. Doses are calculated based on body weight and then rounded to the nearest available strength.
Special populations:
Renal impairment: Initiate at 2-3 mg/kg per day and adjust according to trough levels and renal function.
Hepatic impairment: Start low (2 mg/kg) and titrate slowly.
Elderly: Consider a 25 % dose reduction from standard adult recommendations.
Administration tips:
Swallow tablets whole with a full glass of water.
Take cyclosporine consistently with respect to meals; food can slightly reduce absorption, so maintain the same routine each day.
Store at room temperature, away from moisture and direct sunlight.
Missed dose: Take the missed tablet as soon as remembered unless the next scheduled dose is within 6 hours; in that case, skip the missed dose. Do not double the dose.
Overdose: Symptoms may include severe vomiting, tremor, hypertension, and kidney failure. Seek emergency medical attention; supportive care and possible use of sandimmune (IV formulation) for severe cases.
Discontinuation: Abrupt cessation can lead to rebound immune activation. Tapering is usually unnecessary for short courses but may be advised after long-term high-dose therapy.
Regular follow-up with a transplant specialist, dermatologist, or rheumatologist ensures safe and effective therapy.
This article provides educational information about cyclosporine and is not a substitute for professional medical advice. Treatment decisions, including use for unapproved indications, must be made under the guidance of a qualified healthcare provider. The content is intended for informational purposes and does not constitute medical recommendations. Always consult a physician before starting, stopping, or changing any medication regimen.
Grapefruit juice can increase cyclosporine blood concentrations by inhibiting CYP3A4 metabolism, potentially leading to toxicity. It is advisable to avoid or limit grapefruit products while on cyclosporine and discuss any dietary concerns with your prescriber.
Gingival hyperplasia is a known side effect. Maintaining good oral hygiene and regular dental check-ups can help manage it. If the growth is significant, inform your doctor; a dose adjustment or alternative therapy may be considered.
Yes, patients on cyclosporine are generally advised to receive inactivated or mRNA COVID-19 vaccines. Immunosuppression may reduce vaccine efficacy, so discuss timing and possible antibody testing with your healthcare provider.
Initially, trough levels are measured weekly or bi-weekly until stable. After stabilization, monitoring every 1-3 months is typical, or more frequently if dosage changes or kidney function fluctuates.
Paradoxically, cyclosporine often causes hirsutism (excess hair growth) rather than hair loss. However, individual reactions vary, and any unexpected hair changes should be reported to a clinician.
Early signs include decreased urine output, swelling of the ankles or feet, and elevated serum creatinine. If you notice these symptoms, seek medical evaluation promptly.
Concurrent use of multiple immunosuppressants can increase infection risk and toxicity. Combination therapy is sometimes intentional (e.g., after organ transplantation) but must be carefully managed by a specialist.
Cyclosporine is not a first-line approved therapy for rheumatoid arthritis in Hong Kong. Its use for this condition would be considered off-label and should only occur under specialist supervision.
Yes, but carry the medication in its original packaging with a copy of the prescription. Some countries may require documentation; verify entry requirements before travel and keep the medication in carry-on luggage to avoid temperature extremes.
Do not flush tablets down the toilet. Use a local medication-take-back program or follow the Hong Kong Department of Health’s guidelines for safe disposal of pharmaceutical waste.
