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. How to stop chloroquine itching Plaquenil and antidepressants Epidemiology. Delayed pressure urticaria DPU is generally considered a rare entity; however, this may be because it is not consistently recognized. 1 Approximately 37% of patients with chronic spontaneous urticaria also have pressure urticaria. 1, 20 The mean age of onset of DPU is in the 30s range, 5-63 y. Numerous reports exist about its efficacy in cholinergic urticaria, cold urticaria, solar urticaria, heat urticaria, symptomatic dermographism, and delayed pressure urticaria. A double-blind RCT over 323 refractory urticaria patients with moderate-to-severe CSU demonstrated a high outcome with omalizumab 150 mg or 300 mg subcutaneous SC. Nov 09, 2018 Hydroxychloroquine can cause serious liver or heart problems, especially if you use certain medicines at the same time, including other medicines to treat malaria; an antibiotic or antifungal. 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. Delayed pressure urticaria hydroxychloroquine Hydroxychloroquine Uses, Dosage & Side Effects -, Consensus statement for the diagnosis and treatment of. Chloroquine histamineNormal dosage daily for plaquenilWhy chloroquine has high volume of distribution Feb 19, 2020 Plaquenil hydroxychloroquine is an antimalarial medication used to treat or prevent malaria, a disease caused by parasites, which enter the body through the bite of a mosquito. Plaquenil is also used to treat symptoms of rheumatoid arthritis and discoid or systemic lupus erythematosus. Side Effects of Plaquenil Hydroxychloroquine, Warnings, Uses. Hydroxychloroquine - Side Effects, Dosage, Interactions.. Chronic Hives, Delayed Pressure - Try this ! Urticarial.. Delayed pressure urticaria is a form of pressure urticaria, which is in turn a form of the condition most of us know as hives. Generally, doctors classify delayed pressure urticaria as a form of "pressure urticaria," which is the reason it's a little difficult to look up on the Internet. Pressure urticaria is condition that causes whelps on the skin. Delayed pressure urticaria is a physical urticaria where erythematous, often painful swellings occur at sites of sustained pressure on the skin, after a delay of several hours. If sought, it is present in up to 40% of patients with ordinary chronic "idiopathic urticaria" to a varying degree. Pressure urticaria may occur immediately after a pressure stimulus or more commonly, in delayed pressure urticaria, after a delay of 4–6 hours. Lesions can be induced by a variety of stimuli including standing, walking, wearing tight clothes or sitting on a hard surface.