You're asking whether Lorfast (loratadine 5 milligrams [mg]) Meltab can cause sleepiness.

🩺 Symptoms

• Drowsiness / sleepiness is listed in the product information as a common adverse effect of Lorfast Meltab.
• Many people take loratadine without feeling sleepy, but individual responses vary.

⚕️ What this likely is

• Loratadine is a second‑generation antihistamine often marketed as "non‑drowsy," yet it can still cause sleepiness in some users.
• Sleepiness may come from the drug itself, combined effects with alcohol or other sedating medicines, or unrelated factors like poor sleep.

🏥 What to do now

• Avoid driving or operating machinery until you know how it affects you.
• Avoid alcohol and other sedatives while taking it.
• If sleepiness bothers you, consider taking the dose in the evening or discuss switching to a different antihistamine with your doctor or allergist.

⚠️ When to see doctor

• Seek emergency care if you have difficulty breathing, swelling of face/throat, or fainting.
• See your doctor or allergist if sleepiness is severe, persistent, or if you think it’s caused by interactions with other medicines.

If you want, I can explain alternative antihistamines, likely drug interactions, or when to consider switching in more detail.