As with all prescription drugs, Navane comes with the risk of side effects, some of them serious. It also can cause withdrawal symptoms when you stop taking it, which can be managed by your physician. Here’s some information on the side effects you should watch out for when taking Navane.
Most Dangerous Side Effects
Navane potentially can cause tardive dyskinesia, which is a condition that causes your muscles to move involuntarily. This is a rare side effect: fewer than one in every 100 people who have taken anti-psychotic medications develops it. But if you do develop tardive dyskinesia, it may not be reversible even if you stop taking Navane. When you have tardive dyskinesia, your tongue may stick out, your mouth or jaw may move or smack involuntarily, and the muscles in your limbs may contract or move without you consciously deciding to move them. Tardive dyskinesia tends to develop in long-term users of Navane and similar drugs, but it can occur even if you’ve only been taking the drug a short time. Women and the elderly are at a higher risk for this serious side effect than other people for whom Navane may be prescribed. If you experience any involuntary muscle movements while taking Navane, inform your doctor immediately—she may decide to change your medications. There’s another potentially fatal neurological condition that may be caused by Navane called neuroleptic malignant syndrome. Symptoms of the neuroleptic malignant syndrome include muscle stiffness, changes in mood or consciousness, a very high fever (in the range of 102 to 104 degrees), and rapid breathing. These symptoms represent a medical emergency, so if you experience them while taking Navane, call 911 or go to the nearest emergency room.
Common Side Effects
There’s a long list of more common but less serious side effects associated with Navane. These include:
ConstipationDecreased sweatingDizzinessLightheadedness or faintingMild drowsinessDry mouthIncreased appetite and weight gainIncreased sun sensitivityStuffy nose
Contact your physician if any of these side effects persist or if they interfere with your daily life—she may be able to adjust your dose or your medications to lessen their effects.
Less Common Side Effects
Navane also can cause the following less common side effects:
Changes in menstrual periodDecreased sexual abilitySwelling of breasts in both males and femalesUnusual secretion of milk
There’s also a risk of liver damage with Navane. Signs of this can include:
Nausea and vomitingFatigue and flu-like symptomsLoss of appetiteItchingJaundice (yellow skin or eyes)Darkened urine
These symptoms are potentially serious, so you should contact your physician immediately if you experience any of them. Navane also can cause eye damage, so call your doctor right away if you have changes in vision, especially reductions in your night vision.
