It sounds like a placidyl - scientific name is - ethchlorvynol. Uses - This medication is used as a sleeping aid for short-term treatment of insomnia. It is usually not prescribed for longer than a one week period. - This medication is best taken 15 to 30 minutes before bedtime. Take this medication with food to prevent dizziness. it sounds like a 750mg Placidyl, But I thought the FDA pulled them from the pharmacy shelves back in 1999 / 2000. At any rate I would go on to a pill identifier website that has pictures to make sure.. Placidyl's are a very strong sedative.. Once that capsule exterior disolves ( approximately 15-30 minutes) it has a hell of kick/rush when it kicks in and at that point you need to be at home and I wouldnt so much as try to even hang up a coat on a hanger, yes it is that STRONG but then again I am going solely on your limited description on here, so be careful and make sure before you ingest ANYTHING...
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Thank you for your response Vicki!
Based on my research, there is definitely a chance that this pill could be Placidyl (750 mg). However, without an imprint it's impossible to know for sure. The pill I found that matches the description is marked with the imprint Placidyl 750 in white letters. It is manufactured by Abbott Laboratories.
The main ingredient is ethchlorvynol; which is a sedative and hypnotic medication. It was developed by Pfizer in the 1950s. In the United States Abbott Laboratories used to sell it under the tradename Placidyl. Since Abbott and Banner Pharmacaps, which manufactured the generic version, discontinued production in 1999, ethchlorvynol has no longer been available in the United States. Ethchlorvynol has been used to treat insomnia, but has been largely superseded and is only offered where an intolerance or allergy to other drugs exists.
Along with expected sedative effects of relaxation and drowsiness, ethchlorvynol can cause skin rashes, faintness, restlessness and euphoria. Early adjustment side effects can include nausea and vomiting, numbness, blurred vision, stomach pains and temporary dizziness. An overdose is marked by confusion, fever, peripheral numbness and weakness, reduced coordination and muscle control, slurred speech, reduced heartbeat.
It is addictive and after prolonged use can cause withdrawal symptoms including convulsions, hallucinations, and memory loss.