- Syringes come with and without needle
- 1/2cc, 1cc, 3cc and larger
- Luer Slip or Luer Lock
- & large to small needle sizes
The luer slip or luer lock and size of syringe or needle can be important to consider when buying syringes and needles to follow your doctor’s plan of care.
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Syringes for Testosterone Therapy | Insulin Syringes | Oral Pet Syringes | A Comparison of Syringe Types
SUMMARY
When discussing medical syringes, we are focusing on syringes that are sterile, disposable, individually wrapped, and may or may not require the attachment of a sharp sterile needle tip intended for injection. Our customers use luer slip syringes for oral pet medications prescribed by a veterinarian, while luer lock syringes provide a more secure syringe to needle connection ideal for testosterone injections prescribed HRT testosterone replacement therapy as directed by your doctor. Insulin Syringes are used daily by Insulin Dependent Diabetics. Syringes and Needles can come with or without a needle, vary in size, luer slip or luer lock syringe to needle connection, and Insulin Syringes have a fixed needle tip unlike other syringes with removable needle tips sold at Cheappinz.com.
What types of uses do medical syringes have?
For our purposes, we will focus on discussing syringes used for injection and syringes used for oral medications such as commonly seen for pet and veterinarian medications.
What types of syringes are best suited for each application?
When selecting a syringe, it is useful to know medical syringes come in a variety of sizes ranging from .5cc or 1/2mL and increase to larger syringe sizes like 3mL syringes, 5mL syringes, 20mL syringes, 60mL syringes and larger.
Syringes also vary in the way the syringe barrel tip is shaped, and this variation will have significance.
Insulin Syringes are unique in the sense that these syringes have a “fixed” needle that is permanent, not able to be removed.
What would an educator highlight as important factors to consider when selecting a syringe?
Is the syringe intended for an oral pet medication or for an injection?
Although both a luer lock and a luer slip syringe will be able to draw up and dispense any liquid it holds, each syringe has unique features that at times make one more appropriate than the other: (describing the tip of the syringe barrel that connects to the needle if needed).
Is this syringe intended for a diabetic administering their insulin as needed? If so, an Insulin Syringe is specifically designed for this exact purpose.
Is this syringe intended for a treatment where the syringe and needle may detach and we want to guarantee this does not happen?
Is this syringe intended for an injection of a thicker medication such as a testosterone injection for low testosterone testosterone therapy injections prescribed by doctors for treatment of low testosterone as diagnosed with blood tests.
What are the types of syringes?
Luer Lock Syringes
Luer Slip Syringes
Insulin Syringes
What is a luer lock syringe? 
A luer lock syringe is a syringe that has the most secure syringe to needle connection. To simplify, the syringe barrel tip has grooves and ridges that look very similar to what we would see on a plastic bottle that has a spin on cap. There are grooves on the syringe, and a medical syringe spins into these grooves for a secure attachment that is difficult to accidentally detach.
When would the luer lock syringe be of value?
A luer lock syringe is very useful for medical professionals who wish to ensure the syringe and needle stay in place and do not come apart. This syringe is also very appropriate for injections of any thick medication such as testosterone injections as part of a prescribed testosterone therapy regimen. Testosterone is a thick viscous medication, and a luer lock syringe would provide a secure connection that would be difficult to detach accidentally.
When using a testosterone injection syringe as an example, the luer lock connection provides the best syringe to needle connection but the needle tip is an equally important variable. Consider pushing the plunger of a syringe with a testosterone injection. The amount of pressure one would have to exert would be greater than the pressure required to administer a thin water based medication.
Additionally, the needle tip also plays a role in the pressure the syringe to needle connection must endure. Consider pushing that same plunger of a syringe with the testosterone injection with a large 20 gauge needle tip. Now, consider how different the testosterone injection would be with a 25 gauge needle tip. The 25 gauge needle tip is significantly smaller, finer needle so it makes sense that one would have to press on the plunger harder, resulting in a higher level of pressure at the syringe to needle connection so that the contents could be administered through the small 25 gauge pin hole opening of the needle tip. Large needle tips are often used for measuring purposes as these large needles are able to draw up medicine and liquid quickly.
What is a luer slip syringe? 
A luer slip syringe describes a syringe with a needle tip that allows for the medical needle to simply press on. In many cases both a luer lock and luer slip could be used for injections without any noticeable difference. When administering oral pet medications prescribed by a veterinarian, a luer slip is the syringe we have all been sent home with. A luer slip will have a cone shaped tip, and a medical needle can press onto this tip easily. For pet oral medications no needle is used and the syringe may be pre-marked by your veterinarian to show the amount of medication prescribed for your pet.
What is an insulin syringe?
What are the features of an Insulin Syringe? 
-Protective Cap Covering the Needle Tip
-Needle Tip Permanently in Place
-Barrel of the Syringe
-Syringe Plunger
Insulin Syringes come in a variety of sizes to meet all patient needs. Insulin Syringes can hold up to 1/2cc or up to 1cc. Insulin Syringes also have very fine needle tips ranging in sizes: 27 gauge, 28 gauge, 29 gauge, 30 gauge, and 31 gauge. Needle length range from 5/16 inch to 1/2 inch.
How are medical needles intended for injections labelled?
Medical needles are individually wrapped, sterile, and intended for one use only. Syringes come with and without Needle Tips. Each needle has a bevelled sharp tip and a variety of sizes are available. The size of the needle selected will depend on its required use.
The parts of a Syringe include:
-Syringe Plunger
-Barrel of the Syringe
tip of the barrel will be Luer Lock or Luer Slip
-Capped Needle (if included)
Needles come in large to small sizes:
18, 20, 21 gauge: large needle
25, 27, 30 gauge: small needle
Are all syringes and needles compatible?
All medical needles and syringes are compatible. This means no matter the brand or the size of the syringe or needle, the syringe and the needle will always fit together as designed.
Where do I get syringes?
Syringes can be purchased from your local pharmacy but many people are opting for online purchases of syringes and needles and Insulin Syringes for more options on sizes, brands, and pricing.
Are all syringes the same?
All syringes will be compatible with all needles, and the increments of measure listed along the barrel of any syringe will be an accurate measurement that can be trusted. There are many brands of products available, and although each syringe and needle will pass a safety and quality threshold, there will always be products that are slightly sharper or slightly better made than a competitor.
Do I need a prescription?
Some states do require a prescription for purchasing syringes and needles and Insulin Syringes at a pharmacy. Online purchases do not require a prescription for mail order syringes.
How do I dispose of a used syringe?
Used syringes should be disposed of properly in a sharps container. Sharps containers are made of thick plastic resistant to needle sticks.
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