Migraine: While it is not common, migraines can cause anisocoria.Vision loss: Significant vision defects can affect pupil size and reactivity.Increased intracranial pressure: This can result from a brain tumor, meningitis (inflammation of the fluid around the brain), or a stroke.Trauma: An injury affecting the eye or the brain may cause the pupils to be unequal.Inflammatory conditions, such as MS and sarcoidosis, also can do this. Inflammation: An infection affecting the eye or the cranial nerves can cause anisocoria.Cranial nerve damage: This can occur due to a stroke (a blockage of blood flow or bleeding in the brain), brain aneurysm (defect in a blood vessel), or a brain tumor.Multiple sclerosis (MS): MS is a chronic neurological disorder that causes symptoms affecting vision, movement, sensation, and more.Phenobarbital is a drug of abuse and you should be aware if anyone is using your medicine improperly or without a prescription. Keep track of the amount of medicine used from each new bottle. Store at room temperature away from moisture, heat, and light. Ask your doctor how to safely stop using phenobarbital. If you are taking phenobarbital to treat seizures, keep taking the medicine even if you feel fine.ĭo not stop using suddenly after long-term use, or you could have unpleasant withdrawal symptoms. Tell your doctor if the medicine does not seem to work as well in treating your condition. Selling or giving away this medicine is against the law.ĭo not change your phenobarbital dose without your doctor's advice. Keep the medication in a place where others cannot get to it. Never share phenobarbital with another person, especially someone with a history of drug abuse or addiction. Do not take this medicine in larger or smaller amounts or for longer than recommended. Tell your doctor if you are breast-feeding a baby.įollow all directions on your prescription label. It is not known whether phenobarbital passes into breast milk or if it could harm a nursing baby. Ask your doctor about using a non-hormonal birth control (condom, diaphragm with spermicide) to prevent pregnancy. Phenobarbital can make birth control pills less effective. Do not start or stop taking this medicine without your doctor's advice, and tell your doctor right away if you become pregnant. Seizure control is very important during pregnancy, and having a seizure could harm both mother and baby. Pheochromocytoma (tumor of the adrenal gland) Ī condition for which you take a blood thinner ( warfarin, Coumadin, Jantoven).įollow your doctor's instructions about taking seizure medication if you are pregnant. To make sure phenobarbital is safe for you, tell your doctor if you have: Severe asthma, chronic obstructive pulmonary disorder (COPD), or other breathing disorder Ī personal or family history of porphyria (a genetic enzyme disorder that causes symptoms affecting the skin or nervous system) Ī history of addiction to phenobarbital or similar medicines ( Valium, Xanax, Ativan, and others). You should not take phenobarbital if you are allergic to phenobarbital or other barbiturates ( Nembutal, Seconal, and others), or if you have: You may report side effects to FDA at 1-80. Call your doctor for medical advice about side effects. This is not a complete list of side effects and others may occur. " hangover" effect (drowsiness the day after taking phenobarbital). Side effects such as confusion, depression, or excitement may be more likely in older adults and those who are ill or debilitated.Ĭommon side effects of phenobarbital may include:įeeling restless or excited (especially in children or older adults) Severe skin reaction- fever, sore throat, swelling in your face or tongue, burning in your eyes, skin pain followed by a red or purple skin rash that spreads (especially in the face or upper body) and causes blistering and peeling. Unusual pain anywhere in your body (especially in the neck, shoulder, or arms) Ī red blood cell disorder-pale skin, muscle weakness, diarrhea, weight loss, rapid heart rate, tongue swelling, numbness or tingling in your hands or feet, feeling short of breath or Phenobarbital may cause serious side effects. Stop taking phenobarbital and get emergency medical help if you have signs of an allergic reaction: hives difficult breathing swelling of your face, eyes, lips, tongue, or throat. Phenobarbital may cause a severe allergic reaction.
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