In one observational zolpidem envio gratuito study from England first trimester exposure in 18 pregnancies including one set of twins resulted in delivery of 11 normal infants and two spontaneous abortions. Before taking zolpidem, tell your doctor about all other medications you use, especially: itraconazole Sporanox ketoconazole Nizoral rifampin Rifadin, Rimactane, Rifater or antidepressants such as imipramine Janimine, Tofranil or sertraline Zoloft. Tell your doctor if you drink or have ever drunk large amounts of alcohol, use or have ever used street drugs, or have overused prescription medications. Zolpidem can cause side effects that may impair your thinking or reactions. There are also symptoms considered non-defining but they often occur as part of fibromyalgia syndrome. Time spent in sleep stages and are zolpidem decreases sleep should not be prescribed in quantities exceeding 1-month supply.