From the Guidelines
Yes, buspirone can cause nausea as a side effect. According to the most recent and relevant evidence, nausea is a common adverse reaction experienced by people taking buspirone, an anti-anxiety medication, particularly when first starting treatment or after dose increases 1. Typically, this side effect is mild to moderate and tends to diminish over time as the body adjusts to the medication, usually within 1-2 weeks of continued use.
To minimize nausea, patients can take buspirone with food, start with a lower dose (such as 5 mg twice daily), and gradually increase to the therapeutic dose (typically 15-30 mg daily divided into multiple doses) as tolerated. The nausea occurs because buspirone affects serotonin receptors in both the brain and gut, which can temporarily disrupt digestive processes.
Some key points to consider when taking buspirone to reduce nausea include:
- Starting with a low dose and gradually increasing as needed and tolerated
- Taking the medication with food to reduce gastrointestinal upset
- Staying hydrated to help minimize side effects
- Avoiding taking the medication on an empty stomach
If nausea becomes severe or persistent, patients should consult their healthcare provider, as dosage adjustments or alternative medications might be necessary. It's essential to weigh the benefits of buspirone against the potential side effects, including nausea, to determine the best course of treatment for each individual patient.
From the FDA Drug Label
ADVERSE REACTIONS (See also PRECAUTIONS) Commonly Observed The more commonly observed untoward events associated with the use of buspirone hydrochloride tablets not seen at an equivalent incidence among placebo-treated patients include dizziness, nausea, headache, nervousness, lightheadedness, and excitement Gastrointestinal Nausea85 Gastrointestinal Infrequent were flatulence, anorexia, increased appetite, salivation, irritable colon, and rectal bleeding; rare was burning of the tongue.
Buspirone and Nausea:
- Yes, buspirone can cause nausea.
- The incidence of nausea in controlled clinical trials was 8% for buspirone hydrochloride patients compared to 5% for placebo patients 2.
- Nausea was also listed as one of the gastrointestinal disturbances that caused discontinuation of treatment, with an incidence of 1.2% 2.
From the Research
Buspirone and Nausea
- The studies provided do not consistently report nausea as a side effect of buspirone.
- In the study 3, it was found that buspirone did not improve nausea symptoms more than placebo (P = 0.75, Nstudies = 2).
- Another study 4 investigated the efficacy of intravenous buspirone for the prevention of postoperative nausea and vomiting, but found no significant difference between buspirone and placebo in preventing nausea and vomiting.
- The lack of evidence suggesting buspirone causes nausea is supported by studies 5, 6, and 7, which report that buspirone has a low incidence of side effects, but do not specifically mention nausea as a common side effect.