Why am I constantly feeling tired and falling asleep at my desk during the day despite getting a good night's sleep, and could this sleepiness be related to my thyroid condition, constipation, or the medications and supplements I take, which include Thyronorm 100 mg, Neurobion Forte, multivitamins, Celin 500, Shelcal 500, Digene, and Cetirizine?
Your daytime sleepiness and constipation may indeed be related to your medications. First, Cetirizine, an antihistamine, is a well-known cause of drowsiness. Second, taking calcium (Shelcal) or antacids (Digene) close to your thyroid medication, Thyronorm (levothyroxine), can severely block its absorption. This can lower your thyroid hormone levels, leading to fatigue and constipation. To help, always take your Thyronorm on an empty stomach in the morning, and wait at least four hours before taking any calcium, multivitamins, or antacids. Please consult your doctor to check your thyroid levels and safely review your daily medication schedule.