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. Chloroquine volume of distribution Chloroquine autophagy 293t Block mhc chloroquine Common side effects may include headache, dizziness, ringing in your ears; nausea, vomiting, stomach pain; loss of appetite, weight loss; mood changes, feeling nervous or irritable; skin rash or itching; or. hair loss. Some side effects of hydroxychloroquine may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Side Effects Nausea, stomach cramps, loss of appetite, diarrhea, dizziness, or headache may occur. If any of these effects persist or worsen, notify your doctor or pharmacist promptly. Remember. 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. Plaquenil side effects insomnia Plaquenil Side Effects on Your Eyes and Vision, Hydroxychloroquine Side Effects - What are the side effects of taking hydroxychloroquineHydroxychloroquine plaquenil and pregnancy For the Consumer. Continuing ringing or buzzing or other unexplained noise in the ears. feeling of constant movement of self or surroundings. irritability. nausea. nervousness. nightmares. sensation of spinning. shakiness and unsteady walk. uncontrolled eye movements. unsteadiness, trembling, or. Plaquenil Side Effects Common, Severe, Long Term -. Hydroxychloroquine Oral Uses, Side Effects, Interactions.. Common Plaquenil side effects a study from FDA data.. Side Effects At first was very difficult - not sure what was my illness and what was side effects. Low blood pressure and low blood sugar, shakiness, nausea, diarrhea. Low blood pressure and low blood sugar, shakiness, nausea, diarrhea. Hydroxychloroquine Side Effects Get emergency medical help if you have signs of an allergic reaction hives; difficulty breathing; swelling of your face, lips, tongue, or throat. Plaquenil is a first-line drug treatment meaning its the go- to med they use -the one they initially start nearly everyone on when u test positive for auto-immune & it doesn't work for everyone! I tried it for a yr w not one bit of relief. The anxiety is not a common side effect nor is the depression.