Lectranal 60 CapsulesNatural help with allergies Lectranal gets to the root of the allergy! With the special extract of the tragacanth root (Astragalus membranaceus), Lectranal works naturally against allergies and prevents unpleasant allergy symptoms (watery eyes, itchy skin, runny nose, dry, irritating cough) in the first place. Lectranal is the natural remedy for allergies as it prevents allergy symptoms from developing instead of just temporarily suppressing them.