Mysimba Tablets

Side effects

Like any other drug, Mysimba can cause side effects that you don't want. Some of these side effects can be more severe, which could mean that the treatment has to be stopped.

Some common side effect include:

• Sleeping problems
• Stress and agitation
• Headaches 
• Constipation
• Stomach pain
• Nausea
• Pain in joints and muscles

Uncommon side effects include:

• Allergic reactions (like a rash or an itchy skin condition)
• Depression, irritability, and more energy
• Tinnitus, dizziness, and vertigo
• Feeling tired, having trouble focusing, and not having enough energy
• Heart palpitations, hot flashes, and sweating a lot
• Pain in the chest
• Diarrhoea
• Changes in taste, dry mouth, and toothaches
• Ejaculation that is late
• Feeling hot and cold
• Loss of hair

Very rare side effects include:

• Athlete's foot
• Swollen glands in the groyne, armpit, or neck
• Strange dreams and nightmares
• Nervousness, feeling disoriented, tense, irritable, having mood swings, hallucinations, confusion, severe paranoia, and feeling very suspicious
• Problems with balance
• Loss of memory and mental problems
• Almost passing out
• Getting motion sick
• Pain or discomfort in the ears
• Having trouble seeing, blurred vision, eye irritation, pain, or swelling, and being more sensitive to light
• Pain in the nose, stuffy nose, runny nose, sneezing, and sinus problems
• Pain in the throat, more mucus being coughed up, trouble breathing, problems with the voice, coughing, and yawning
• Blood pressure that changes or goes up
• Pain in the middle of the stomach
• Uncontrollable burps
• Swollen lips
• A hernia
• Having gas (flatulence), haemorrhoids, ulcers or cavities
• Pain and swelling in the gallbladder
• Back pain that happens when the disc between two bones (vertebra) bulges out
• Period problems, vaginal bleeding, and dryness in the vulva and vagina
• Having trouble getting or keeping an erection
• Having strange feelings or being weak
• Feeling thirsty and hot
• Being cold in the limbs (hands, feet)
• More creatinine in the blood, which means the kidneys aren't working as well.
• More bilirubin and liver enzymes, liver problems, and hepatitis
• Lessened haemoglobin, which means fewer red blood cells.

Some people who take Mysimba may also experience other rare or very rare side effects. To learn more about all of these side effects, always read the Patient Information Leaflet.

Who should not take Mysimba?

You should not take Mysimba if the following apply to you: 

• You are breastfeeding, trying to get pregnant, or are already pregnant
• You are younger than 18 or older than 75
• You are allergic to any of the ingredients in Mysimba or are taking any medicines that contain any of the active ingredients in Mysimba
• You suffer from severe liver disease, end-stage renal disease, high blood pressure that can't be controlled, a history of seizures or fits, a brain tumour, opioid dependence, acute alcohol, opioid, or benzodiazepine withdrawal, bipolar disorder, bulimia, or anorexia nervosa, or a history of any of these conditions
• If you are on monoamine oxidase inhibitors (MOI), you must wait at least 14 days after stopping your MOI before starting Mysimba.
• If you are on any opiates or medicines that contain opiates (like morphine, codeine, cough syrups with dextromethorphan, or methadone), you need to wait at least 7–10 days before starting Mysimba.