Safety Guide

Contraindications

Certain conditions may make peptide use inadvisable. Always disclose your full medical history to your healthcare provider.

Peptides may be contraindicated if you have:

• Active cancer or history of cancer (especially GH-related peptides)
• Pregnancy or breastfeeding
• Severe kidney or liver disease
• Active infections (some peptides modulate immune function)
• Diabetic retinopathy (growth hormone peptides may worsen it)
• Known allergy to any peptide component or BAC water preservative

Drug Interactions

Peptides can interact with medications you're already taking. Some interactions may be dangerous.

Be cautious combining peptides with:

• Insulin or diabetes medications — GH peptides and GLP-1 agonists affect blood sugar
• Blood thinners (anticoagulants) — some peptides affect clotting factors
• Immunosuppressants — immune-modulating peptides like Thymosin Alpha-1 may conflict
• Corticosteroids — may reduce or alter peptide effectiveness
• Other hormone therapies (TRT, HRT) — stacking hormonal compounds requires careful monitoring

Signs You Should Stop

While most peptides are well-tolerated, your body will tell you if something is wrong. Listen to it.

Stop using peptides immediately if you experience:

• Severe or worsening nausea, vomiting, or diarrhea
• Significant swelling in hands, feet, or face
• Persistent numbness or tingling
• Severe headaches that don't resolve
• Rapid or irregular heartbeat
• Difficulty breathing or chest tightness
• Signs of allergic reaction (hives, swelling, difficulty breathing)
• Severe pain at injection sites beyond normal soreness

When to See a Doctor

Don't try to self-diagnose serious symptoms. Seek medical attention promptly in these situations.

See a healthcare provider if:

• Side effects persist beyond 2 weeks or worsen over time
• You notice unusual lumps, skin changes, or growths
• Bloodwork shows abnormal values after starting peptides
• Injection sites show signs of infection (spreading redness, warmth, pus, fever)
• You experience mood changes, depression, or anxiety after starting a protocol
• You feel generally unwell with no clear cause

Emergency Information

Signs of anaphylaxis:

• Sudden onset of hives or skin flushing
• Swelling of the throat, tongue, or lips
• Difficulty breathing or wheezing
• Rapid drop in blood pressure (dizziness, fainting)
• Nausea, vomiting, or abdominal cramps

If you have a known allergy risk, consider keeping an epinephrine auto-injector (EpiPen) available and inform someone nearby about your peptide use.

Disclaimer

Always consult with a qualified healthcare provider before starting, stopping, or modifying any peptide protocol. The information in this guide does not replace professional medical advice, diagnosis, or treatment.

PeptideLab and its contributors are not responsible for any adverse effects resulting from the use of information provided. Use peptides at your own risk and with proper medical supervision.