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Details with Side Effects
Zaleplon is a nonbenzodiazepine hypnotic from the pyrazolopyrimidine class. The chemical name of zaleplon is N-[3-(3-cyanopyrazolo[1,5-a]pyrimidin-7-yl)phenyl]-N-ethylacetamide. Its empirical formula is C17H15N5O, and its molecular weight is 305.34. The structural formula is shown below.
Zaleplon is a white to off-white powder that is practically insoluble in water and sparingly soluble in alcohol or propylene glycol. Its partition coefficient in octanol/water is constant (log PC = 1.23) over the pH range of 1 to 7.
Sonata® capsules contain zaleplon as the active ingredient. Inactive ingredients consist of microcrystalline cellulose, pregelatinized starch, silicon dioxide, sodium lauryl sulfate, magnesium stearate, lactose, gelatin, titanium dioxide, D&C yellow #10, FD&C blue #1, FD&C green #3, and FD&C yellow #5.
What are the possible side effects of zaleplon (Sonata)?
Stop using zaleplon and call your doctor at once if you have any of these serious side effects:
- aggression, agitation, changes in behavior;
- thoughts of hurting yourself; or
- hallucinations (hearing or seeing things).
Less serious side effects may include:
- day-time drowsiness, dizziness, "hangover" feeling;
- problems with memory or concentration;
- numbness or tingling;
- anxiety, depression, nervous feeling;
- problems with vision;
- nausea, stomach pain, loss of appetite, constipation;
What are the precautions when taking zaleplon (Sonata)?
Before taking zaleplon, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before using this medication, tell your doctor or pharmacist your medical history, especially of: liver problems, very high/low blood pressure, breathing problems (e.g., asthma), depression, history of drug/alcohol abuse.
This drug may make you dizzy or drowsy. Do not drive, use machinery, or do any activity that requires alertness until you are sure you can perform such activities safely. Avoid alcoholic beverages.
To reduce the risk of dizziness and lightheadedness, get up slowly when rising from a sitting...
Last reviewed on RxList: 1/2/2008
This monograph has been modified to include the generic and brand name in many instances.
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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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