(primidone, USP) Anticonvulsant
Chemical name: 5-ethyldihydro-5-phenyl-4,6 (1H, 5H)-pyrimidinedione. Structural formula:
Mysoline (primidone) is a white, crystalline, highly stable substance, M.P. 279-284°C. It is poorly soluble in water (60 mg per 100 mL at 37°C) and in most organic solvents. It possesses no acidic properties, in contrast to its barbiturate analog.
Mysoline (primidone) 50 mg and 250 mg tablets contain the following inactive ingredients: Microcrystalline Cellulose, NF; Lactose, USP; Methylcellulose, USP; Sodium Starch Glycolate, NF; Talc, USP; Sodium Lauryl Sulfate, NF; Magnesium Stearate, NF; Water, USP, Purified.
Mysoline (primidone) 250 mg tablets also contain Yellow Iron Oxide, NF.
What are the possible side effects of primidone (Mysoline)?
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have any new or worsening symptoms such as: mood or behavior changes, depression, anxiety, or if you feel agitated, hostile, restless, hyperactive (mentally or physically), or have thoughts about suicide or hurting yourself.
Call your doctor at once if you have any of these serious side effects:
- slurred speech;
- loss of balance or coordination;
- easy bruising...
Last reviewed on RxList: 8/12/2010
This monograph has been modified to include the generic and brand name in many instances.
Additional Mysoline Information
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You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
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