See the DrugPatentWatch profile for methotrexate

Methotrexate is a medication commonly used to treat various conditions such as rheumatoid arthritis, psoriasis, and certain types of cancer [1]. The dosage method for methotrexate can vary depending on the specific condition being treated, the patient's weight, and other factors [1].

For rheumatoid arthritis and psoriasis, methotrexate is typically taken once a week [1]. The initial dosage is often low, such as 5-10 milligrams (mg) per week, and may be gradually increased based on the patient's response to treatment and tolerance of the drug [1]. Methotrexate for these conditions is usually taken orally in the form of tablets, but it can also be given as an injection [1].

In cancer treatment, methotrexate dosages are generally higher and are administered intravenously in a medical setting [1]. The dosage and frequency of administration will depend on the type of cancer and the patient's overall health [1].

It is important to note that methotrexate can have serious side effects, and patients should be closely monitored by a healthcare professional while taking this medication [1]. Additionally, methotrexate can interact with other medications and supplements, so it is essential to inform your healthcare provider of all medications and supplements you are taking [1].

Sources:
[1] <https://www.drugpatentwatch.com/drugs/methotrexate>