It is used in products such as Vicks VapoRub. Camphor is applied to the skin to relieve pain and reduce itching.It is also applied to the skin on the neck and chest so that it can be breathed in to reduce the urge to cough. 

Camphor belongs to the class of medicines called rubefacients/antitussives. When applied to the skin, it increases blood flow and local temperature of the affected area which suppresses and temporarily relieves pain sensations. It also eases cough, nasal/throat irritation by moistening air passages when used along with steam.

Major & minor side effects for Camphor

• Skin Irritation
• Hypersensitivoty
• Irritation of ear
• Allergic skin rash

Do not use it on broken or injured skin as the body could absorb too much amount causing toxicity.

Do not use it if you are pregnant or breastfeeding.

It should never be taken orally as this can cause serious side effects.

Diclofenac is a Nonsteroidal Anti-Inflammatory Drug (NSAID). This medicine works by reducing substances in the body that cause pain and inflamation.

• Diclofenac is used to relieve pain, swelling (inflammation), and joint stiffness. Reducing these symptoms helps you do more of your normal daily activities.
• Diclofenac is used to treat mild to moderate pain, or signs and symptoms of osteoarthritis or rheumatoid rthritis.
• Diclofenac powder (Cambia) is used to treat a migraine headache attack. Cambia will only treat a headache that has already begun. It will not prevent headaches or reduce the number of attacks.

• Upset stomach, nausea, heartburn, diarrhea, constipation, gas, headache, drowsiness, and dizziness may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.
• This medication may raise your blood pressure. Check your blood pressure regularly and tell your doctor if the results are high.
• Tell your doctor right away if any of these unlikely but serious side effects occur: hearing changes (such as ringing in the ears), mental/mood changes, difficult/painful swallowing, symptoms of heart failure (such as swelling ankles/feet, unusual tiredness, unusual/sudden weight gain).

• You should not use diclofenac if you have a history of allergic reaction to aspirin or NSAIDs (non-steroidal anti-inflammatory drugs).
• Diclofenac can increase your risk of fatal heart attack or stroke, especially if you use it long term or take high doses, or if you have heart disease. Do not use this medicine just before or after heart bypass surgery (coronary artery bypass graft, or CABG).
• Diclofenac may also cause stomach or intestinal bleeding, which can be fatal.
• Taking diclofenac during the last 3 months of pregnancy may harm the unborn baby.
• It passes into breast milk. While there have been no reports of harm to nursing infants, consult your doctor before breast-feeding.
• To make sure this medicine is safe for you, tell your doctor if you have:
• Heart Disease, High Blood Pressure
• Ulcers or Bleeding In Your Stomach
• Asthma
• Liver or Kidney Disease
• If You Smoke.