These are drugs you can purchase at drugstores.
KWANGDONG Powersen solution
OTC Drugs > Nutritious tonic
Ingredients Citrulline Maleate 1.0g Indication Secondary treatment of functional asthenia dosage and administration "Adults: once as citrulline malate 1g, three times a day. Children (6 years and older): once as citrulline malate 1g, take twice a day However, no more than 4 weeks of administration." how supplied 1bottle/case