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. Increase in malaria deaths after chloroquine failure Pharmacology of chloroquine 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. Of course, I will get another flare in the future and will treat it again. As you probably know, when you're having a flare you should eliminate any high histamine foods from your diet - at least for a while. I do hope this helps someone else with chronic hives caused by delayed pressure. 0 likes, 25 replies Pressure urticaria is the development of raised, itchy, reddish areas of skin in response to pressure. The skin changes may occur four to eight hours after the pressure is relieved, and some doctors prefer the term "delayed pressure urticaria" to describe this phenomenon. 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 Delayed pressure urticaria symptoms, treatments & forums., Chronic Hives, Delayed Pressure - Try this ! Urticarial. Chloroquine compatibilityPatient teaching when taking hydroxychloroquinePlaquenil infection Acute Consistent Urticaria Physical Urticarias Urticarial Vasculitis Chronic Idiopathic Urticaria IgE Mediated Episodic Hives Acute Reactions—Often in minutes or hours Very common---Normally with other Symptoms Common With Foods—Within 2 hours Nuts, Shellfish, kiwi, egg white, milk, soy, etc. Pediatric Urticaria Urticaria & Angioedema A Practical Guide. What is Pressure Urticaria? with pictures. Delayed Pressure Urticaria - Journal of Investigative.. The mechanism is unknown. Combining telbivudine Tyzeka and hydroxychloroquine may increase the risk of unexplained muscle pain, tenderness, or weakness because both drugs cause such side effects. Hydroxychloroquine suppresses the immune system and should not be combined with drugs that also suppress the immune system or live vaccines. The optimal duration of therapy with cyclosporine is not known. We typically treat patients at a dose required for complete or near-complete control of urticaria for three months and then taper the dose over several months, as tolerated. In the majority of patients, six to nine months of treatment is adequate. 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.