Topical Administration

The goal of this clinical trial is to learn if a botanical Total Coumarin topical cream (TC Cream) works to treat psoriasis in adults. It will also learn about the safety of the topical TC Cream. The main questions it aims to answer are: * Does TC Cream improve the psoriasis disease symptoms? * What medical problems do participants have when applying TC Cream? * Does TC Cream improve the quality of life of psoriasis patients? Researchers will compare TC Cream to a placebo cream (a look-alike cream that contains no active drug) to see if TC Cream works to treat psoriasis. Participants will: * Topically apply the TC Cream or a placebo cream twice daily every day to affected skin for 8 weeks * Visit the clinic once every 2 weeks for checkups and tests * Keep a diary of their symptoms and their diseased skin conditions during the application of the topical cream

The goal of this observational study is to evaluate the effectiveness of topical nifedipine 0.3% plus lidocaine 1.5% for uncomplicated hemorrhoidal disease. The main question it aims to answer is: Does topical nifedipine 0.3% plus lidocaine 1.5% lower symptoms in patients with uncomplicated acute hemorrhoidal disease? Participants already taking nifedipine 0.3% plus lidocaine 1.5% as part of their regular medical care for hemorrhoidal disease will undergo four visits over a 30-day period, including two telephone contacts and two in-person visits.

Evaluation of the safety and topical efficacy of a scar gel after 90 days of continuous use, comparing it to a benchmark for preventing hypertrophic scars and improving appearance, hydration and pigmentation.

The goal of this clinical trial is to learn if the drug MILTEFOSINE, used topically in a hydrogel, works to treat non-complicated cutaneous leishmaniasis (CL) in adults. It will also learn about the safety of the drug MILTEFOSINE used topically. The main questions it aims to answer are: * Is topical treatment with MILTEFOSINE hydrogel effective in patients with CL, thus justifying its continuation in the clinical phases (II and III) of development? * What skin problems do participants have when using miltefosine hydrogels over CL lesions? Researchers will evaluate the safety and effectiveness of various concentrations of MILTEFOSINE hydrogel: 0.5%, 1.0%, and 1.5%. Participants will: * Apply the MILTEFOSINE hydrogel to the affected lesions daily for 28 consecutive days. * Visit the Center at least two days prior to the study. This initial visit will include diagnostic tests, interviews, study information, informed consent, and the administration of the first doses. After this, patients are required to return to the clinic on day 28 and again three months later for additional check-ups and tests. * Take a photo once a week for checkups, and keep a note of their symptoms