Sudafed Sinus Congestion 12 Hour Maximum Strength Non-Drowsy Caplets provide long-lasting relief from congestion and sinus pressure. From the #1 pharmacist recommended brand among oral OTC decongestants, each extended-release caplet contains 120 mg of pseudoephedrine HCl for 12 hours of powerful, non-drowsy congestion relief. The maximum strength formula of this decongestant medicine temporarily relieves sinus congestion and pressure, as well as nasal congestion due to the common cold, hay fever, or other upper respiratory allergies. These coated decongestant caplets can be used by adults and children 12 years and older. NOT SOLD ONLINE: Sudafed Maximum Strength 12 Hour Sinus Decongestant Caplets are for in-store purchase only. Find Sudafed behind the pharmacy counter, without a prescription.