What should you know about no jet lag pills side effects?

Products marketed for jet lag are not all alike. A sleep-promoting ingredient may reduce alertness, while another preparation may cause stomach upset, headache, dizziness, or a next-day foggy feeling. Alcohol, other sedating medicines, age, and health conditions can increase these effects. Jet lag itself may cause [Headache](/symptoms/headache/), [Daytime Sleepiness](/symptoms/daytime-sleepiness/), and [Difficulty Sleeping](/symptoms/difficulty-sleeping/), so note when a symptom began in relation to the product.

Read the full label and keep the packaging. Do not combine an unfamiliar product with alcohol or another sleep-inducing medicine unless a clinician has checked the combination. Avoid driving, swimming alone, or safety-sensitive tasks while dizzy or drowsy. Tell a pharmacist about every medicine and supplement you use. A [Travel Health Consultation](/treatments/occupational-and-travel-medicine/travel-health-consultation/) can help you plan before departure.

Call emergency services for trouble breathing, fainting, severe confusion, or swelling of the lips, tongue, or throat. A rapidly spreading rash also needs prompt assessment. Contact a clinician about persistent vomiting, severe dizziness, or sleep disruption that continues after travel. Ongoing sleep problems may need review for [Insomnia](/conditions/insomnia/).

Ask which effects are expected for the exact ingredient, how long reduced alertness may last, whether your medicines alter the risk, and what to do if symptoms appear.