Antihistamines generally, and Diphenydramine Hcl specifically, act by antagonizing histamine at the site of the H1 histamine receptor. Antihistamines dry up the secretion of the nose, throat, and eyes. They relieve itch and will help you go to sleep. Dimenhydrinate depresses the middle-ear function, but the way in which it actually prevents nausea, vomiting, or dizziness is not known. However, these drugs are not just antihistamines. They have a significant amount of anticholinergic activity.

The LD50 of Diphenhydramine in rats is 500mg/kg. For humans it is not known, so be careful! Lethal doses in humans are almost always far less than lethal doses in rats (allowing for body weight differences), so don't try to take the rat LD50 and apply it to yourself. Also, note that the LD50 is the dose at which 50% of the subjects will die. A lower dose will still kill a smaller proportion of the subjects - i.e. it may be that the LD10 (i.e. 10% mortality) for rats is just 100 mg/kg. See similar questions...

Phenterprin HCL contains an adrenergic (activating with an epinephrine or epinephrine-like substance) group of amines which help to stimulate beta-3 cell receptors to help facilitate the utilization of energy substrates, stimulate metabolic processes, favor uptake of amino acids into muscle, increase lipolysis (breakdown of fat) as well as aid in mild hunger-suppressant effects. See similar questions...

Yes, in fact any aqeuous solution of HCl alone will work. Concentration doesn't even really matter provided that pH is monitored - add the amount needed to achieve the desired pH change. Unless the reagents are attacked by drippingWeenieDogs it shouldn't matter all that much. Best to place it safe and use lids anyways. See similar questions...

Phenterprin HCL is an extremely powerful pharmaceutical-grade oral appetite suppressant created for those who are significantly overweight. It helps you feel less hungry while giving you more energy. The recommended initial dose for Phenterprin HCL in 30mg capsules is to start with one Phenterprin HCL 30mg capsule per day. Your doctor can best determine the appropriate dose for you. See similar questions...

Zanfel works safely into the dermal layer of your skin, binds to the urushiol oil, and, when rinsed off, takes the oil with it down the drain. See similar questions...