If any of these effects persist or worsen, tell your doctor or pharmacist promptly. Remember that your doctor has prescribed this medicine because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects. Check your blood pressure regularly and tell your doctor if the results are high.
Tell your doctor right away if you have any serious side effects, including: blurred vision, fast/pounding/irregular heartbeat, mental/mood/behavior changes (such as agitation, aggression, mood swings, depression, hallucinations, abnormal thoughts/behavior, suicidal thoughts/attempts), uncontrolled movements, muscle twitching/shaking, signs of blood flow problems in the fingers or toes (such as coldness, numbness, pain, or skin color changes), unusual wounds on the fingers or toes, outbursts of words/sounds, change in sexual ability/interest, swelling ankles/feet, extreme tiredness, rapid/unexplained weight loss, frequent/prolonged erections (in males). Get medical help right away if you have any very serious side effects, including: shortness of breath, fainting, chest/jaw/left arm pain, seizures, weakness on one side of the body, slurred speech, confusion, sudden vision changes. This medication may increase serotonin and rarely cause a very serious condition called serotonin syndrome/toxicity. The risk increases if you are also taking other drugs that increase serotonin, so tell your doctor or pharmacist of all the drugs you take (see Drug Interactions section). Get medical help right away if you develop some of the following symptoms: fast heartbeat, hallucinations, loss of coordination, severe dizziness, severe nausea/vomiting/diarrhea, twitching muscles, unexplained fever, unusual agitation/restlessness. A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.
This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch. In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345. Before taking this medication, tell your doctor or pharmacist if you are allergic to it; or to other sympathomimetic drugs (such as amphetamine or dextroamphetamine); or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Before using this medication, tell your doctor or pharmacist your medical history, especially of: blood circulation problems (such as Raynaud's disease), certain mental/mood conditions (such as severe agitation, psychosis), personal/family history of mental/mood disorders (such as bipolar disorder, depression, psychotic disorder, suicidal thoughts), heart problems (including irregular heartbeat, coronary artery disease, previous heart attack, heart failure, cardiomyopathy, problems with heart structure such as valve problems), family history of heart problems (such as sudden death, irregular heartbeat), history of stroke, high blood pressure, overactive thyroid (hyperthyroidism), a certain eye problem (glaucoma), seizures, kidney disease, personal or family history of a substance use disorder (such as overuse of or addiction to drugs/alcohol), personal/family history of uncontrolled muscle movements (such as Tourette's syndrome). Alcohol or marijuana (cannabis) can make you more dizzy. Do not drive, use machinery, or do anything that needs alertness until you can do it safely. Talk to your doctor if you are using marijuana (cannabis). Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products). Children may be more sensitive to the side effects of this drug, especially weight loss. The doctor may recommend temporarily stopping the medication from time to time to reduce this risk. Consult your doctor or pharmacist for more details. During pregnancy, this medication should be used only if clearly needed. Infants born to mothers who are dependent on this medication may be born too soon (premature) and have low birth weight. Tell your doctor right away if you notice possible mood changes, agitation, or unusual tiredness in your newborn. This medication passes into breast milk and may have undesirable effects on a nursing infant.
Therefore, breast-feeding is not recommended while using this drug. This medication is used to treat pain caused by nerve damage due to diabetes, shingles (herpes zoster) infection, or spinal cord injury. This medication is also used to treat pain in people with fibromyalgia. It is also used with other medications to treat certain types of seizures (focal seizures).
Read the Medication Guide and, if available, the Patient Information Leaflet provided by your pharmacist before you start using pregabalin and each time you get a refill.