Although not all of these side effects may occur, if they do occur they may need medical attention. Check with your doctor immediately if any of the following side effects occur while taking hydroxychloroquine: Incidence not known Some side effects of hydroxychloroquine may occur that usually do not need medical attention. Does the drug plaquenil cause hair loss Hydroxychloroquine dile Does plaquenil help with allergies Long-term hydroxychloroquine use has been associated with retinal toxicity, although patients with rheumatologic conditions often discontinue hydroxychloroquine therapy due to inadequate disease control rather than toxicity. Rheumatoid Arthritis. The action of hydroxychloroquine is cumulative and may require weeks to months to achieve the maximum therapeutic effect see CLINICAL PHARMACOLOGY. Initial adult dosage 400 mg to 600 mg 310 to 465 mg base daily, administered as a single daily dose or in two divided doses. Other long term current drug therapy. Z79.899 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2019 edition of ICD-10-CM Z79.899 became effective on October 1, 2018. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. These side effects may go away during treatment as your body adjusts to the medicine. Hydroxychloroquine long term RA and Hydroxychloroquine How Effective is it for Rheumatoid Arthritis., Plaquenil - FDA prescribing information, side effects and uses Hydroxychloroquine 200 mg nombre comercialHydroxychloroquine and pres Applies to hydroxychloroquine oral tablet Along with its needed effects, hydroxychloroquine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention. Hydroxychloroquine Side Effects Common, Severe, Long Term.. ICD-10-CM Diagnosis Code Z79.899 Other long term.. Hydroxychloroquine Plaquenil. P atients taking Plaquenil hydroxychloroquine, Sanofi-Aventis on a long-term basis may leave you scratching your head when it comes to coding the patient encounters. Although coding for long-term medications is not a difficult process, it often involves communicating with other physicians or specialists to obtain accurate information. BACKGROUND Hydroxychloroquine is used for the treatment of rheumatoid arthritis RA and systemic lupus erythematosus SLE. Long term studies have shown a high rate of termination of hydroxychloroquine treatment in patients with RA. Long-Term Side Effects of Plaquenil for Rheumatoid Arthritis. Plaquenil is the brand name of hydroxychloroquine, a drug used to prevent or treat malaria. Plaquenil is also used for long-term treatment of autoimmune diseases such as rheumatoid arthritis RA and systemic lupus erythmatosis.