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Sex differences in physical dependence on methaqualone in the rat
1Department of Applied Pharmacology, School of Pharmacy, Hoshi University, Tokyo, Japan.
Pharmacology, Biochemistry, and Behavior
|June 1, 1988
Summary
This study shows that methaqualone (MQ) causes physical dependence in both male and female rats. However, females exhibit more severe withdrawal symptoms, indicating significant sex differences in MQ dependence.
Area of Science:
- Pharmacology
- Neuroscience
- Toxicology
Background:
- Methaqualone (MQ) is a sedative-hypnotic drug with a history of abuse.
- Understanding the development and sex differences in physical dependence is crucial for assessing its risks.
Purpose of the Study:
- To investigate the establishment of physical dependence on methaqualone (MQ) in rats.
- To identify potential sex differences in MQ-induced physical dependence and withdrawal.
Main Methods:
- The drug-admixed food (DAF) method was employed to administer MQ to male and female rats.
- Gradually increasing doses of MQ were used to establish dependence.
- Withdrawal signs were monitored after drug cessation.
Main Results:
- Female rats exhibited hypothermia and motor incoordination at lower MQ doses compared to males.
- Severe withdrawal signs, including convulsions and death, were observed in females upon MQ withdrawal.
- A modified dosing schedule induced hypothermia and severe withdrawal in males, including convulsions and death.
Conclusions:
- The DAF method effectively establishes methaqualone (MQ) physical dependence in both male and female rats.
- Marked sex differences exist in the manifestation and severity of MQ physical dependence and withdrawal symptoms.