Medicine Name: Gulfadryl Syrup. Composition: Ammonium Chloride (138mg) + Sodium Citrate (57.03mg) + Diphenhydramine (14.08mg) + Menthol (1.14mg). Side Effects: Stomach pain epigastric pain Allergic reaction Sleepiness Dizziness Thickened respiratory tract secretions Impaired coordination.