
DENTAL PRACTITIONERS WHO EMPLOY LOCAL ANESTHETIC AGENTS SHOULD BE WELL VERSED IN DIAGNOSIS AND MANAGEMENT OF EMERGENCIES THAT MAY ARISE FROM THEIR USE. RESUSCITATIVE EQUIPMENT, OXYGEN AND OTHER RESUSCITATIVE DRUGS SHOULD BE AVAILABLE FOR IMMEDIATE USE.
To minimize the likelihood of intravascular injection, aspiration should be performed before the local anesthetic solution is injected. If blood is aspirated, the needle must be repositioned until no return of blood can be elicited by aspiration. Note, however, that the absence of blood in the syringe does not assure that intravascular injection will be avoided.
Prilocaine HCl 4% with Epinephrine 1:200,000 injection contains sodium metabisulfite, a sulfite that may cause allergic -type reactions including anaphylactic symptoms and life-threating or less sever asthmatic episodes in certain susceptible people. The overall prevalence of sulfite sensitivity in the general population is unknown and probably low. Sulfite sensitivity is seen more frequently in asthmatic than non-asthmatic people.
Methemoglobinemia
Prilocaine has been associated with the development of methemoglobinemia. Very young patients, patients with congenital or idiopathic methemoglobinemia, or patients with glucose-6-phosphate deficiencies are more susceptible to methemoglobinemia.
Patients taking drugs associated with drug induced methemoglobinemia such as sulfonamides, acetaminophen, acetanilid, aniline dyes, benzocaine, chloroquine, dapsone, napthalene, nitrates and nitrites, nitrofurantoin, nitroglycerin, nitroprusside, pamaquine, para-aminosalicylic acid, phenacetin, phenobarbital, phenytoin, primaquine, and quinine are also at greater risk for developing methemoglobinemia.
There is currently no manufacturer warning information available for this drug.
Prilocaine Hydrochloride 4% with Epinephrine 1:200,000 injection is indicated for the production of local anesthesia in dentistry by nerve block or infiltration techniques. Only accepted procedures for these techniques as described in standard textbooks are recommended.
Prilocaine Hydrochloride 4% with epinephrine 1:200,000 injection is a sterile, non pyrogenic isotonic solution that contains a local anesthetic agent with epinephrine (as bitartrate) and is administered parenterally by injection. See INDICATIONS AND USAGE for specific uses. The quantitative composition is shown in Table 1.
Prilocaine Hydrochloride 4% with epinephrine 1:200,000 injection contains prilocaine HCl, which is chemically designated as propanamide, N-(2-methyl-phenyl)-2-(propylamino)-,monohydrochloride and has the following structural formula:
1.jpg
Epinephrine bitartrate is (-)-3,4-Dihydroxy-a-[(methylamino)methyl] benzyl alcohol and has the following formula:
2.jpg
Parenteral drug products should be inspected visually for particulate matter and discoloration prior to administration.
The specific quantitative composition is shown in Table 1.
| Ingredients | Prilocaine HCl | Epinephrine | Citric Acid | Sodium Metabisulfite | pH |
| Formula (mg/mL) | 40.0 mg/mL | 0.005 mg/mL | 0.2 mg/mL | 0.5 mg/mL | 3.3 to 5.5 |
Note: Sodium hydroxide or hydrochloric acid may be used to adjust the pH of Prilocaine Hydrochloride 4% with epinephrine 1:200,000 injection.