Drug List


Drug Name

Mysoline (Primidone)

Manufactured By

Valeant Pharmaceuticals North America LLC

Drug Savings

Nationwide Prescription Connection (NPC) is an experienced advocacy service that helps connect patients to manufacturer provided free and discount programs. We can help the uninsured, under insured, those in the Medicare gap also known as the "doughnut hole", or even those needing help with expensive co-pays.  Our web site makes it easy for you to enter the medications you are taking, along with some basic patient information, and then finds the program that is right for you.

NPC's mission is your health. We recognize your need for help when you are applying for discount programs for your prescription medications. We consist of friendly and experienced advocates that not only know how these free and discount programs work, but are ready to help. We are available to take your call and answer any questions you may have as you search for the right program to fit your needs. We can also explain any supporting material you may need to provide as you apply for these programs. If for any reason you are denied, we also are experienced in the best appeals process with a high success rate.

Treats Disease/Condition


Primidone is used alone or with other medications for treating grand mal, psychomotor, or focal epileptic seizures. It may be effective for grand mal seizures that are not responsive to other anticonvulsants. Primidone should not be used by patients with porphyria and people who are allergic to phenobarbital.

How To Use

Take MYSOLINE exactly as prescribed. Your healthcare provider will tell you how much MYSOLINE to take and when to take it. our healthcare provider may change your dose. Do not change your dose without talking to your healthcare provider. Do not stop taking MYSOLINE without first talking to your healthcare provider. Stopping MYSOLINE suddenly can cause serious problems. If you take too much MYSOLINE, call your healthcare provider or local Poison Control Center right away.

Side Effects

Common side effects of primidone include: Difficulty speaking (dysarthria); Burning, tingling from damaged nerves (paresthesia); Difficulty moving (ataxia); Loss of balance (vertigo); Paradoxical excitement (children); Hyperactivity (children); Excitement; Confusion; Depression; Drowsiness; Irritability; Headache; Restlessness; Nystagmus; Dizziness; Possible serious side effects of primidone include: Acute psychosis; Nausea; Vomiting; Constipation; Diarrhea; Folate-deficiency anemia; Liver toxicity; Low blood calcium; Rickets; Weakening of bones; Rash; Serious skin reactions (for example, Stevens-Johnson syndrome) Seizure medications increase the risk of suicidal thoughts or behavior. Patients treated with seizure medications should be observed for the emergence or worsening of depression, suicidal thoughts or behavior, and unusual changes in mood or behavior.

Drug Interactions

Primidone may decrease blood levels and the effect of several drugs by increasing the activity of liver enzymes that breakdown these drugs. Examples of drugs affected by Primidone include naloxegol (Movantik), roflumilast (Daliresp), lurasidone (Latuda), and many others.

In Case of Overdose

In Case of Missed Dose


STORAGE: Primidone should be stored at room temperature, 20 C - 25 C (68 F - 77 F).